12/21/2010 11:41 am ET | Updated May 25, 2011

Rihanna, Christina Aguilera Performances Prompt 'X Factor' Ofcom Investigation

British regulators have launched an investigation into this month's "X Factor" finale following claims that performances by Christina Aguilera and Rihanna were too sexy for family TV.

The "X Factor" finale aired from 7-9 PM on Saturday, December 11. Under British rules, 9PM is the "watershed hour," after which adult content can be shown.

During the finale, a scantily-clad Aguilera performed "Express" from her recent film, "Burlesque," while Rihanna stripped during a performance of her hit, "What's My Name?"

Ofcom has reportedly received almost 2,750 complaints about the performances, with an additional 1,500 complaints registered with broadcaster ITV. The show could be fined, and ITV could be forced to apologize, if Ofcom finds that the show violated code.

An estimated 14 million viewers watched the X Factor finale.

Watch the performances below:

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