Question: What show did the cast of Glee also perform on in December 2010?
About the article "Glee (TV series)", section "Promotion".

Candidate passages:
"Don't Stop Believin'" was part of the setlist of Glee Cast's worldwide 2010/11 concert tour, Glee Live!
In Concert!
On April 7, 2010, Glee Cast performed the song on the "The Oprah Winfrey Show".
On April 13, 2010, Glee Cast performed the song on the "2010 White House Easter Egg Roll", along with "National Anthem", "True Colors", "Somebody to Love", "Over the Rainbow", "Home" and "Sweet Caroline".
On December 5, 2010, Glee Cast performed the song on the UK version of the "The X Factor". 
On January 11, 2010, Fox President Kevin Reilly announced that "Glee" had been picked up for a second season, and would be holding nationwide, open casting calls to fill three new roles.
The auditions were intended to be the subject of a multi-part television special, which would air in the lead-in to the second season premiere, with the new cast members revealed in the first episode.
Series creator Ryan Murphy stated that "Glee" aimed to become "the first interactive musical comedy on television".
Ultimately, the reality show did not go ahead, due to Murphy's desire to concentrate on the main series and fear that the distraction of the reality show might damage "Glee".
As of "Audition", formerly recurring cast members Heather Morris and Naya Rivera were promoted to series regulars as cheerleaders and glee club members Brittany Pierce and Santana Lopez respectively.
The episode introduced four new cast members.
Chord Overstreet plays Sam Evans, a recurring character who is initially an athletic protégé of glee club member Finn, but becomes his rival.
Charice appears as Sunshine Corazon, a foreign exchange student and rival to Rachel.
Charice was a fan of the show during its first season, and had her manager approach Murphy about casting her in season two.
Dot-Marie Jones was cast as football coach Shannon Beiste, replacing season one cast member Patrick Gallagher as Ken Tanaka.
Cheyenne Jackson appears as Dustin Goolsby, the new director of rival glee club Vocal Adrenaline, replacing Shelby Corcoran (Idina Menzel).
Jackson was originally considered for the role of Will, and in 2009 was cast in the "Glee" episode "Acafellas" as Vocal Adrenaline choreographer Dakota Stanley, but he was unable to perform due to illness.
Murphy described Dustin as "a complete villain", and stated that he will "become very intertwined in Will's life". 
Prior to the second episode's premiere, "Glee"'s cast went on tour at several Hot Topic stores across the nation.
The cast sang the U.S. national anthem at the third game of the 2009 World Series.
Macy's invited them to perform at the 2009 Macy's Thanksgiving Day Parade, but host broadcaster NBC declined because "Glee" aired on a rival network.
Murphy commented on the cast's exclusion: "I completely understand NBC's position, and look forward to seeing a Jay Leno float.
"The show's success sent the cast on a concert tour, Glee Live!
In Concert!
after the first season's wrapup.
They visited Phoenix, Chicago, Los Angeles, and New York.
The cast also recorded a cover of Wham!
's "Last Christmas", which was released as a single in late 2009 but didn't appear in the show until "A Very Glee Christmas" on December 10, 2010.
Morrison, Lynch, Michele, Monteith, and Colfer reprised their roles as Will, Sue, Rachel, Finn, and Kurt respectively for a cameo appearance in an episode of "The Cleveland Show" that aired January 16, 2011.
Michele, Monteith, and Riley appeared as campers in the twenty-second season premiere of "The Simpsons".
Lynch, Colfer, Monteith, and Riley appeared at the 2010 MTV VMAs on September 12, 2010.
When Agron, Michele, and Monteith posed for a set of risqué photos for the November 2010 edition of "GQ" magazine, Parents Television Council (PTC) criticized the show; PTC president Tim Winter commented that "Glee" has many young fans, and that "by authorizing this kind of near-pornographic display, the creators of the program have established their intentions on the show’s direction.
And it isn't good for families.
"The promotional posters for the first season have the show's stars using their right hands to make an "L" to fill in the "L" of the word "Glee".
The second season's promotional posters have the stars throwing slushies at the camera in pairs.
The third season's promotional posters have the stars getting dodgeballs thrown at them by Sue Sylvester.
While the cast concert tour, Glee Live!
In Concert!, began on May 15, 2010, and presented concerts in four cities in the US that month, the second edition, with an almost-entirely new set list, toured for four weeks in the US and Canada from May 21 through June 18, 2011, and followed with twelve days in England and Ireland, from June 22 through July 3, 2011.
The cast also performed on the seventh season of "The X Factor" on December 5, 2010.
"Audition" is the second season premiere and 23rd episode overall of the American television series "Glee".
The episode was written by Ian Brennan, directed by Brad Falchuk, and premiered on the Fox network on September 21, 2010.
In "Audition", the glee club members attempt to attract new recruits, including foreign exchange student Sunshine Corazon (Charice) and transfer student Sam Evans (Chord Overstreet).
A new football coach, Shannon Beiste (Dot-Marie Jones), arrives at McKinley High, and school blogger Jacob Ben Israel (Josh Sussman) provides updates on the glee club's summer break.
The episode features eight musical and dance performances, five of which were released as singles, available for download.
Musical performances attracted mixed reviews from critics.
Lea Michele's rendition of "What I Did for Love" from "A Chorus Line" was described by Robert Bianco of "USA Today" as putting "every amateur musical performance on every TV talent show this year to shame", though both Mary McNamara of the "Los Angeles Times" and Todd VanDerWerff of "The A.V.
Club" found it incongruous in context.
Charice's performances were well received by American and Filipino critics, and Alicia Keys expressed approval of the "Glee" cast cover of "Empire State of Mind".
"Audition" was watched by 12.45 million American viewers, and attained "Glee" series high Nielsen rating in the 18–34 demographic.
It received generally favorable reviews from critics, and "Entertainment Weekly" Tim Stack and the "New York Post" Jarett Wieselman both stated that it had assuaged their fears of the show declining in quality in its second season.
Brett Berk of "Vanity Fair" and "Rolling Stone" Erica Futterman both felt the show had returned to form following an increasingly disappointing first season.
Several critics highlighted racial issues with the episode: Fred Topel of "Hollywood News" described a scene involving Sunshine as "downright racist", and Brittany Drye of "The Stir" also questioned the pairing of Asian characters Mike Chang (Harry Shum, Jr.) and Tina Cohen-Chang (Jenna Ushkowitz). 
During the first season of "Glee", the show paid tribute to Madonna with the episode "The Power of Madonna".
Murphy planned two tribute episodes for the second season: "Britney/Brittany", and a second, originally planned to air after Super Bowl XLV in February 2011.
Many of the show's young cast members were inspired to pursue musical careers by Spears.
Murphy stated that it was Spears' idea for "Glee" to use her songs, explaining: "I think she loves what the show's about, paying tribute to pop culture in a very loving, respectful, kind way.
She responded to that."
He described Spears as "arguably the most important female other than Lady Gaga in the last 10 years," commenting that the episode is not only concerned with her music, but also her public image.
In May 2010, Morrison told "US Weekly" that he hoped no Spears songs would be performed on "Glee".
Based on his comments, Murphy had Morrison's character Will spend the episode resisting his students' desire to perform her songs.
Will's storyline featuring a Chevrolet Corvette involved product placement for the Chevrolet division of General Motors, who became an advertiser and event sponsor for "Glee" prior to its 2009 launch.
The cast received their scripts for the episode on July 26, 2010, and Murphy began directing it on August 2, 2010.
Spears filmed her guest starring scenes on August 18 and 19, 2010.
Murphy commented that: "At the heart of it, it's a show designed to show off the skills of Heather Morris".
Prior to appearing in "Glee", Morris was a back-up dancer for Beyoncé Knowles.
She was originally hired as a choreographer to teach cast members Colfer and Jenna Ushkowitz the "Single Ladies" dance.
A week later, she was cast as cheerleader Brittany.
Morris had a recurring role throughout the first season, and was promoted to a series regular for season two.
At the 2010 Television Critics Association Summer Press Tour, Murphy stated that Brittany would have "big storylines" in the new season, as viewers want to know more about her.
Stamos makes his first "Glee" appearance in "Britney/Brittany" playing Carl Howell, a dentist and Emma's love-interest.
Other recurring characters who appear in the episode are glee club member Mike Chang (Harry Shum, Jr.), Principal Figgins (Iqbal Theba), Coach Shannon Beiste (Jones), school reporter Jacob Ben Israel (Sussman), cheerleader Becky Jackson (Lauren Potter), school bullies Dave Karofsky (Max Adler) and Azimio (James Earl) and student Lauren Zizes (Fink).
"So You Think You Can Dance" contestant Mark Kanemura appears as a backing dancer.