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Exhibit
12.3



| | CERTIFICATIONS
| | --------------

I, Guy
Fauré, certify that:

|1. | I have reviewed this Amendment No. 1 to the annual report on Form 20-F of Mamma.com
  Inc.;                                                                                                                                                                                                                                              
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|  
|2. | Based on my knowledge, this report does not contain any
  untrue statement of a material fact or omit to state a material fact
  necessary to make the statements made, in light of the circumstances under
  which such statements were made, not misleading with respect to the period
  covered by this report;                       
|  
|3. | Based on my knowledge, the financial statements, and other
  financial information included in this report, fairly present in all
  material respects the financial condition, results of operations, and cash
  flows of the company as of, and for, the periods presented in this
  report;                                            
|  
|4. | The companys other certifying officer(s) and I are
  responsible for establishing and maintaining disclosure controls and
  procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and
  internal control over financial reporting (as defined in Exchange Act
  Rules 13a-15(f) and 15d-15(f)) for the company and have:
|  
|   | a)                                                                                                                                                                                                                                                                                                                                       
|  
|   | b)                                                                                                                                                                                                                                                                                                                                       
|  
|   | c)                                                                                                                                                                                                                                                                                                                                       
|  
|   | d)                                                                                                                                                                                                                                                                                                                                       
|  
|5. | The companys other certifying officer(s) and I have
  disclosed, based on our most recent evaluation of internal control over
  financial reporting, to the companys auditors and the audit committee of
  the companys board of directors (or persons performing the equivalent
  functions):                                        
|  
|   | a)                                                                                                                                                                                                                                                                                                                                       
|  
|   | b)                                                                                                                                                                                                                                                                                                                                       
|  

|Date: |  | May 12, 2006 |  |                                      
|----- |  | ------------ |  | -------------------------------------
|      |  |              |  | /s/ Guy Fauré                        
|      |  |              |  | Guy Fauré                            
|      |  |              |  | President and Chief Executive Officer

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