Document:

<PAGE>

                                                                   EXHIBIT 10.10

                              SIXTH AMENDMENT TO

                             TAX SHARING AGREEMENT

                                 by and among

                                  AT&T CORP.,

                          LIBERTY MEDIA CORPORATION,
               for itself and each member of the Liberty Group,

                          TELE-COMMUNICATIONS, INC.,

                          LIBERTY VENTURES GROUP LLC,

                           LIBERTY MEDIA GROUP LLC,

                               TCI STARZ, INC.,

                            TCI CT HOLDINGS, INC.,

                                      and

           each Covered Entity listed on the signature pages hereof,

                         dated as of December 10, 1999

                                       1
<PAGE>

          This Sixth Amendment, dated as of December 10, 1999 (this "Sixth
Amendment"), to the Tax Sharing Agreement (the "Agreement") dated as of March 9,
1999, as amended by the First Amendment (the "First Amendment") to the Tax
Sharing Agreement dated as of May 28, 1999, the Second Amendment (the "Second
Amendment") to the Tax Sharing Agreement dated as of September 24, 1999, the
Third Amendment (the "Third Amendment") to the Tax Sharing Agreement dated as of
October 20, 1999, the Fourth Amendment (the "Fourth Amendment") to the Tax
Sharing Agreement dated as of October 28, 1999, and the Fifth Amendment to the
Tax Sharing Agreement dated as of December 6, 1999, is entered into by and among
AT&T Corp., a New York corporation ("AT&T"), Liberty Media Corporation, a
Delaware corporation ("Liberty"), for itself and on behalf of each member of the
Liberty Group, Tele-Communications, Inc., a Delaware corporation, Liberty
Ventures Group LLC, a Delaware limited liability company, Liberty Media Group
LLC, a Delaware limited liability company, TCI Starz, Inc., a Colorado
corporation, TCI CT Holdings, Inc., a Delaware corporation, each Covered Entity
listed on the signature pages hereof, and each entity which becomes a party to
the Agreement pursuant to Section 23 thereto. Unless otherwise stated herein,
capitalized terms used in this Sixth Amendment shall have the meaning ascribed
to such terms in the Agreement.

          WHEREAS, the parties have entered into the Agreement which governs the
sharing, allocation and reimbursement of federal, state, local and foreign taxes
by the members of the Common Stock Group and the Liberty Group;

          WHEREAS, AT&T intends to acquire The Todd-AO Corporation, a Delaware
corporation ("Todd"), in a transaction qualifying as a tax-free reorganization
under Section 368(a) of the Code pursuant to an Agreement and Plan of Merger
dated as of December 10, 1999 (the "Todd Merger Agreement") for and on behalf of
the Liberty Group;

          WHEREAS, the parties intend that any Tax Items arising from or
relating to the Todd Merger (as defined below), including any Tax Items of Todd
or any of its direct or indirect assets or subsidiaries, shall be considered Tax
Items attributable to the Liberty Group except to the extent set forth herein;
and

          WHEREAS, the parties now wish to amend the Agreement in certain
respects to clarify the intent of the parties with respect to the sharing,
allocation and reimbursement of federal, state, local and foreign taxes by the
members of the Common Stock Group and the Liberty Group and to make such other
amendments, as provided herein;

          NOW, THEREFORE, in consideration of the mutual covenants contained
herein, the parties hereby amend the Tax Sharing Agreement as follows:

          1.   The Agreement is amended by inserting as Section 3(d)(xv):

          "(xv)  Todd Merger.  Any Tax Item arising from or relating to Todd,
                 -----------
B-Group Merger Corp. ("Todd Merger Sub") or any of their respective direct or
indirect subsidiaries or

                                       2
<PAGE>

affiliates (or any predecessor or successor of any of the foregoing under
applicable corporate, limited liability company, partnership or other
organizational law) (the "Todd Entities"); the status of any member of the
Common Stock Group as the successor under Code Section 381 (or comparable
provision of state, local or foreign Tax law) to any of the Todd Entities; any
direct or indirect asset, liability, business, investment or operation of any of
the Todd Entities; the merger of Todd Merger Sub with and into Todd (the "Todd
Merger"), the Todd Merger Agreement, the Post-Merger Restructuring Transactions
(as defined in the Todd Merger Agreement), the Reclassification (as defined in
the Todd Merger Agreement), the issuance of New Liberty Media Group Tracking
Stock in the Todd Merger or any other transaction contemplated by the Todd
Transaction Documents (as defined below) (any of the foregoing Tax Items
specified in this sentence shall be referred to hereinafter as a "Todd Tax
Item"), shall be for the account of the Liberty Group (except to the extent
otherwise provided in this Section 3(d)(xv) with respect to any Todd Tax Item),
and Liberty shall pay AT&T any Tax (or any reduction in any Tax refund, credit
or other benefit) attributable thereto. Notwithstanding anything in the
preceding sentence to the contrary, any Todd Tax Item (except for any Todd Tax
Item realized after the stock in Todd acquired in the Todd Merger is transferred
to Liberty, other than any Todd Tax Item which consists of any income or gain
realized on the disposition, termination or settlement of any Todd/AT&T Option
(as defined below) (or any income or gain realized on the transfer of the
property described in clause (X) or (Y) of the definition of Todd/AT&T Option
pursuant to any Todd/AT&T Option)) shall be for the account of AT&T hereunder
if, and to the extent that, such Todd Tax Item arises directly from and would
not have arisen but for (i) any inaccuracy in any of the representations by AT&T
or Todd Merger Sub in the Officer's Certificate dated as of the closing date of
the Todd Merger delivered by AT&T and Todd Merger Sub in connection with the
opinions to be delivered pursuant to Sections 8.2(f), 8.3(e) and 8.4(f) of the
Todd Merger Agreement, (ii) any breach by AT&T or Todd Merger Sub of any of
their representations or covenants in Sections 2.8, 3.7(b), 3.8(a), 3.8(c), 3.9,
5.4 and (except to the extent of any conflict between the requirements of
Section 7.14 of the Todd Merger Agreement and Article 9 of this Agreement) 7.14
of the Todd Merger Agreement or (iii) any breach by AT&T of any representation
or covenant in the Inter-Group Agreement (except in the case of clauses (i),
(ii) and (iii), to the extent arising out of or relating to the adoption by the
Capital Stock Committee of the AT&T Board of Directors of the resolutions
attached as Exhibit A to the Second Supplement to the Inter-Group Agreement,
dated as of September 24, 1999 (the "Second Supplement") or any action taken by
AT&T or any other member of the Common Stock Group in good faith in accordance
with the terms of the Second Supplement or Second Amendment in connection with
the Stock Repurchase Program (as defined in the Second Supplement) or any
Repurchase Transaction or any other action taken by AT&T at the request of
Liberty as contemplated by Section 1.2(d) of the Fifth Supplement to Inter-Group
Agreement dated December 10, 1999 (the "Fifth Supplement") or otherwise in
writing), and AT&T shall pay to the applicable Governmental Authority or to
Liberty any Tax, and shall pay to Liberty any reduction in any Tax refund,
credit or other benefit that is for the account of Liberty hereunder,
attributable thereto. "Todd Transaction Documents" shall mean the Todd Merger
Agreement, the Fifth Supplement, or this Sixth Amendment, or any other document
to which Todd, Liberty or any of their respective Subsidiaries (as defined in
the Todd Merger Agreement) or Affiliates (as defined in the Todd

                                       3
<PAGE>

Merger Agreement) is a party that is referred to in the Todd Merger Agreement,
the Fifth Supplement, or this Sixth Amendment or executed in connection
therewith. "Todd/AT&T Option" shall mean any option or contractual obligation
(other than any option or contractual obligation (A) that Liberty requests in
writing to be entered into or (B) pursuant to any of the Todd Transaction
Documents, the Contribution Agreement, the AT&T Charter or any other agreement
to which Liberty is a party) with respect to (X) the stock in Todd acquired in
the Todd Merger, or (Y) any direct or indirect asset, liability, business,
investment or operation of any of the Todd Entities, which option or contractual
obligation is entered into in writing by AT&T or any other member of the Common
Stock Group (or that AT&T or any other member of the Common Stock Group causes
any of the Todd Entities to enter into in writing) prior to the transfer of the
stock in Todd acquired in the Todd Merger to Liberty."

          2.   The Agreement is amended by (i) deleting in Section 9(b) the word
"or" after the words "or any Subsidiary of Ascent during any such period for
such period," and before the words "(IV) 4MC for any taxable period ..." and
(ii) inserting in Section 9(b) the words ", or (V) Todd for any taxable period
ending on or prior to the date of the closing of the Todd Merger or any
Subsidiary of Todd during any such period for such period" after the words "or
any Subsidiary of 4MC during any such period for such period" and before the
words "; provided, however, that (i) AT&T shall be entitled to participate ...
 ."

          3.   The Agreement is amended by (i) inserting in Section 3(d)(xiv)
the words "Todd Merger Sub," after the words "Ascent Merger Sub," and before the
words "nor 4MC Merger Sub ..."; (ii) inserting in Section 3(d)(xiv) the words
"Todd Merger Agreement," after the words "Ascent Merger Agreement," and before
the words "or 4MC Merger Agreement ..."; and (iii) inserting in Section
3(d)(xiv) the words "Todd," after the words "any action (or failure to act) of
any of AGI, Ascent," and before the words "4MC or any of their respective
subsidiaries...."

          4.   The Agreement is amended by inserting in Section 3(d)(i) the
words "(except to the extent of any conflict between the requirements of Section
7.13 of the AGI Merger Agreement and Article 9 of this Agreement)" after the
words "5.5, 7.7," and before the words "7.13, and 7.15 of the AGI Merger
Agreement ..." and by inserting in Section 3(d)(i) the words "(except to the
extent of any conflict between the requirements of Section 3.11 of the AGI
Merger Agreement and Article 9 of this Agreement)" after the words "3.6, 3.7,"
and before the words "3.11, 3.12 ...."

          5.   Except as otherwise expressly provided herein, the Agreement
shall continue in full force and effect without modification.

                                       4
<PAGE>

          IN WITNESS WHEREOF, each of the parties has caused this Sixth
Amendment to be executed by its respective duly authorized officer as of the
date first set forth above.

                                    AT&T CORP.

                                    By: /s/ Marilyn J. Wasser
                                        ---------------------
                                    Name:  Marilyn J. Wasser
                                    Title: Vice President--Law & Secretary

                                    LIBERTY MEDIA CORPORATION, for
                                    itself and for each member of the Liberty
                                    Group

                                    By: /s/ Charles Y. Tanabe
                                        ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                       5
<PAGE>

Each of the Covered Entities listed below on this page hereby executes this
Sixth Amendment as a member of the Liberty Group to acknowledge that such Person
is bound by this Sixth Amendment as a member of the Liberty Group:

                                    LIBERTY SP, INC.

                                    By: /s/ Charles Y. Tanabe
                                        ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                    LIBERTY AGI, INC.

                                    By: /s/ Charles Y. Tanabe
                                        ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                    LMC INTERACTIVE, INC.

                                    By: /s/ Charles Y. Tanabe
                                        ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                       6
<PAGE>

                                    TELE-COMMUNICATIONS, INC.

                                    By: /s/ Stephen M Brett
                                        -------------------
                                    Name:  Stephen M. Brett
                                    Title: Sr. Executive Vice President

                                    LIBERTY VENTURES GROUP LLC

                                    By: /s/ Stephen M. Brett
                                        --------------------
                                    Name:  Stephen M. Brett
                                    Title: Vice President

                                    LIBERTY MEDIA GROUP LLC

                                    By: /s/ Charles Y. Tanabe
                                        ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Vice President

                                    TCI STARZ, INC.

                                    By: /s/ Stephen M. Brett
                                        --------------------
                                    Name:  Stephen M. Brett
                                    Title: Vice President

                                    TCI CT HOLDINGS, INC.

                                    By: /s/ Charles Y. Tanabe
                                        ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                       7<PAGE>

                                                                   EXHIBIT 10.11

                             SEVENTH AMENDMENT TO

                             TAX SHARING AGREEMENT

                                 by and among

                                  AT&T CORP.,

                          LIBERTY MEDIA CORPORATION,
               for itself and each member of the Liberty Group,

                          TELE-COMMUNICATIONS, INC.,

                          LIBERTY VENTURES GROUP LLC,

                           LIBERTY MEDIA GROUP LLC,

                               TCI STARZ, INC.,

                            TCI CT HOLDINGS, INC.,

                                      and

           each Covered Entity listed on the signature pages hereof,

                         dated as of December 30, 1999

                                       1
<PAGE>

          This Seventh Amendment, dated as of December 30, 1999 (this "Seventh
Amendment"), to the Tax Sharing Agreement (the "Agreement") dated as of March 9,
1999, as amended by the First Amendment to the Tax Sharing Agreement dated as of
May 28, 1999, the Second Amendment (the "Second Amendment") to the Tax Sharing
Agreement dated as of September 24, 1999, the Third Amendment to the Tax Sharing
Agreement dated as of October 20, 1999, the Fourth Amendment to the Tax Sharing
Agreement dated as of October 28, 1999, the Fifth Amendment to the Tax Sharing
Agreement dated as of December 6, 1999, and the Sixth Amendment to the Tax
Sharing Agreement dated as of December 10, 1999, is entered into by and among
AT&T Corp., a New York corporation ("AT&T"), Liberty Media Corporation, a
Delaware corporation ("Liberty"), for itself and on behalf of each member of the
Liberty Group, Tele-Communications, Inc., a Delaware corporation, Liberty
Ventures Group LLC, a Delaware limited liability company, Liberty Media Group
LLC, a Delaware limited liability company, TCI Starz, Inc., a Colorado
corporation, TCI CT Holdings, Inc., a Delaware corporation, each Covered Entity
listed on the signature pages hereof, and each entity which becomes a party to
the Agreement pursuant to Section 23 thereto.  Unless otherwise stated herein,
capitalized terms used in this Seventh Amendment shall have the meaning ascribed
to such terms in the Agreement.

          WHEREAS, the parties have entered into the Agreement which governs the
sharing, allocation and reimbursement of federal, state, local and foreign taxes
by the members of the Common Stock Group and the Liberty Group;

          WHEREAS, following the merger of SounDelux Entertainment Group, Inc.,
a California corporation ("SounDelux California") with and into its wholly owned
subsidiary, Soundelux Entertainment Group of Delaware, Inc., a Delaware
corporation ("Soundelux") and the reclassification of the stock of Soundelux, as
the surviving corporation in such merger, AT&T intends to acquire Soundelux in a
transaction qualifying as a tax-free reorganization under Section 368(a) of the
Code pursuant to an Agreement and Plan of Merger dated as of December 30, 1999
(the "Soundelux Merger Agreement") for and on behalf of the Liberty Group;

          WHEREAS, the parties intend that any Tax Items arising from or
relating to the Soundelux Merger (as defined below), including any Tax Items of
Soundelux or any of its direct or indirect assets or subsidiaries, shall be
considered Tax Items attributable to the Liberty Group except to the extent set
forth herein; and

          WHEREAS, the parties now wish to amend the Agreement in certain
respects to clarify the intent of the parties with respect to the sharing,
allocation and reimbursement of federal, state, local and foreign taxes by the
members of the Common Stock Group and the Liberty Group and to make such other
amendments, as provided herein;

          NOW, THEREFORE, in consideration of the mutual covenants contained
herein, the parties hereby amend the Tax Sharing Agreement as follows:

          1.   The Agreement is amended by inserting as Section 3(d)(xvi):

                                       2
<PAGE>

          "(xvi)    Soundelux Merger.  Any Tax Item arising from or relating to
                    ----------------
Soundelux, SounDelux California, C-Group Merger Corp. ("Soundelux Merger Sub")
or any of their respective direct or indirect subsidiaries or affiliates (or any
predecessor or successor of any of the foregoing under applicable corporate,
limited liability company, partnership or other organizational law) (the
"Soundelux Entities"); the status of any member of the Common Stock Group as the
successor under Code Section 381 (or comparable provision of state, local or
foreign Tax law) to any of the Soundelux Entities; any direct or indirect asset,
liability, business, investment or operation of any of the Soundelux Entities;
the merger of Soundelux Merger Sub with and into Soundelux (the "Soundelux
Merger"), the Soundelux Merger Agreement, the Reclassified Company Charter (as
defined in the Soundelux Merger Agreement), the Post-Merger Restructuring
Transactions (as defined in the Soundelux Merger Agreement), the Todd
Contributions (as defined in the Soundelux Merger Agreement), the
Reincorporation Merger (as defined in the Soundelux Merger Agreement), the
Reclassification (as defined in the Soundelux Merger Agreement), the MTS Earnout
(as defined in the Soundelux Merger Agreement), the Escrow Agreement (as defined
in the Soundelux Merger Agreement), the Registration Rights Agreement (as
defined in the Soundelux Merger Agreement), the Shareholders Agreement (as
defined in the Soundelux Merger Agreement), the issuance of New Liberty Media
Group Tracking Stock in the Soundelux Merger or any other transaction
contemplated by the Soundelux Merger Agreement, the Reclassified Company Charter
(as defined in the Soundelux Merger Agreement), the Sixth Supplement to Inter-
Group Agreement dated December 30, 1999 (the "Sixth Supplement"), or this
Seventh Amendment, the Escrow Agreement (as defined in the Soundelux Merger
Agreement), the Registration Rights Agreement (as defined in the Soundelux
Merger Agreement), the Shareholders Agreement (as defined in the Soundelux
Merger Agreement), or any other document to which Soundelux, Liberty or any of
their respective Subsidiaries (as defined in the Soundelux Merger Agreement) or
Affiliates (as defined in the Soundelux Merger Agreement) is a party that is
referred to in the Soundelux Merger Agreement, the Reclassified Company Charter
(as defined in the Soundelux Merger Agreement), the Sixth Supplement, the Escrow
Agreement (as defined in the Soundelux Merger Agreement), the Registration
Rights Agreement (as defined in the Soundelux Merger Agreement), the
Shareholders Agreement (as defined in the Soundelux Merger Agreement),  or this
Seventh Amendment or executed in connection therewith (any of the foregoing Tax
Items specified in this sentence shall be referred to hereinafter as a
"Soundelux Tax Item"), shall be for the account of the Liberty Group (except to
the extent otherwise provided in this Section 3(d)(xvi) with respect to any
Soundelux Tax Item), and Liberty shall pay AT&T any Tax (or any reduction in any
Tax refund, credit or other benefit) attributable thereto.  Notwithstanding
anything in the preceding sentence to the contrary, any Soundelux Tax Item shall
be for the account of AT&T hereunder if, and to the extent that, such Soundelux
Tax Item arises directly from and would not have arisen but for (i) any breach
by AT&T or Soundelux Merger Sub of any of their representations or covenants in
Sections 2.8(a), 5.4 and (except to the extent of any conflict between the
requirements of Section 10.1 of the Soundelux Merger Agreement and Article 9 of
this Agreement) 10.1 of the Soundelux Merger Agreement or (ii) any breach by
AT&T of any representation or covenant in the Inter-Group Agreement (except in
the case of clauses (i) and

                                       3
<PAGE>

(ii), to the extent arising out of or relating to the adoption by the Capital
Stock Committee of the AT&T Board of Directors of the resolutions attached as
Exhibit A to the Second Supplement to the Inter-Group Agreement, dated as of
September 24, 1999 (the "Second Supplement") or any action taken by AT&T or any
other member of the Common Stock Group in good faith in accordance with the
terms of the Second Supplement or Second Amendment in connection with the Stock
Repurchase Program (as defined in the Second Supplement) or any Repurchase
Transaction or any action taken by AT&T at the request of Liberty as
contemplated by Section 1.2(d) of the Sixth Supplement or otherwise in writing),
and AT&T shall pay to the applicable Governmental Authority or to Liberty any
Tax, and shall pay to Liberty any reduction in any Tax refund, credit or other
benefit that is for the account of Liberty hereunder, attributable thereto."

          2.   The Agreement is amended by (i) deleting in Section 9(b) the word
"or" after the words "or any Subsidiary of 4MC during any such period for such
period," and before the words "(V) Todd for any taxable period ..." and (ii)
inserting in Section 9(b) the words ", or (VI) Soundelux for any taxable period
ending on or prior to the date of the closing of the Soundelux Merger or any
Subsidiary of Soundelux during any such period for such period" after the words
"or any Subsidiary of Todd during any such period for such period" and before
the words "; provided, however, that (i) AT&T shall be entitled to
participate ...."

          3.   The Agreement is amended by (i) inserting in Section 3(d)(xiv)
the words "Soundelux Merger Sub," after the words "Todd Merger Sub," and before
the words "nor 4MC Merger Sub ..."; (ii) inserting in Section 3(d)(xiv) the
words "Soundelux Merger Agreement," after the words "Todd Merger Agreement," and
before the words "or 4MC Merger Agreement ..."; and (iii) inserting in Section
3(d)(xiv) the word "Soundelux," after the words "any action (or failure to act)
of any of AGI, Ascent, Todd," and before the words "4MC or any of their
respective subsidiaries ...."

          4.   The agreement is amended by (i) inserting in Section 3(d)(xv) the
words ""Soundelux Transaction Documents" shall mean the Soundelux Merger
Agreement, the Sixth Supplement, the Seventh Amendment, the Reclassified Company
Charter (as defined in the Soundelux Merger Agreement), the Shareholders
Agreement (as defined in the Soundelux Merger Agreement), the Escrow Agreement
(as defined in the Soundelux Merger Agreement), or the Registration Rights
Agreement (as defined in the Soundelux Merger Agreement), or any other document
to which Soundelux, Liberty or any of their respective Subsidiaries (as defined
in the Soundelux Merger Agreement) or Affiliates (as defined in the Soundelux
Merger Agreement) is a party that is referred to in the Soundelux Merger
Agreement, the Sixth Supplement, the Seventh Amendment, the Reclassified Company
Charter (as defined in the Soundelux Merger Agreement), the Escrow Agreement (as
defined in the Soundelux Merger Agreement), the Shareholders Agreement (as
defined in the Soundelux Merger Agreement) or the Registration Rights Agreement
(as defined in the Soundelux Merger Agreement) or executed in connection
therewith." after the words "or this Sixth Amendment or executed in connection
therewith." and before the words ""Todd/AT&T Option" shall mean ..." and (ii)
inserting in Section 3(d)(xv) the

                                       4
<PAGE>

words "Soundelux Transaction Documents," after the words "pursuant to any of the
Todd Transaction Documents," and before the words "the Contribution
Agreement ..."

          5.   Except as otherwise expressly provided herein, the Agreement
shall continue in full force and effect without modification.
<PAGE>

          IN WITNESS WHEREOF, each of the parties has caused this Seventh
Amendment to be executed by its respective duly authorized officer as of the
date first set forth above.

                                    AT&T CORP.

                                    By:/s/ Robert S. Feit
                                       ------------------
                                    Name:  Robert S. Feit
                                    Title: Assistant Secretary

                                    LIBERTY MEDIA CORPORATION, for
                                    itself and for each member of the Liberty
                                    Group

                                    By:/s/ Charles Y. Tanabe
                                       ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                       6
<PAGE>

Each of the Covered Entities listed below on this page hereby executes this
Seventh Amendment as a member of the Liberty Group to acknowledge that such
Person is bound by this Seventh Amendment as a member of the Liberty Group:

                                    LIBERTY SP, INC.

                                    By:/s/ Charles Y. Tanabe
                                       ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                    LIBERTY AGI, INC.

                                    By:/s/ Charles Y. Tanabe
                                       ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                    LMC INTERACTIVE, INC.

                                    By:/s/ Charles Y. Tanabe
                                       ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President
<PAGE>

                                    TELE-COMMUNICATIONS, INC.

                                    By:/s/ Stephen M. Brett
                                       --------------------
                                    Name:  Stephen M. Brett
                                    Title: Sr. Executive Vice President

                                    LIBERTY VENTURES GROUP LLC

                                    By:/s/ Stephen M. Brett
                                       --------------------
                                    Name:  Stephen M. Brett
                                    Title: Vice President

                                    LIBERTY MEDIA GROUP LLC

                                    By:/s/ Charles Y. Tanabe
                                       ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

                                    TCI STARZ, INC.

                                    By:/s/ Stephen M. Brett
                                       --------------------
                                    Name:  Stephen M. Brett
                                    Title: Vice President

                                    TCI CT HOLDINGS, INC.

                                    By:/s/ Charles Y. Tanabe
                                       ---------------------
                                    Name:  Charles Y. Tanabe
                                    Title: Senior Vice President

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