Christina Aguilera and Rihanna's 'X Factor' performances investigated by Ofcom

The X Factor final 2010 is set to be investigated by broadcasting regulator Ofcom - following complaints about performances by Rihanna and Christina Aguilera on the December 11 programme.After over 2,750 complaints about the performances were filed Ofcom has now launched an investigation into the show, reports the Press Association.

Rihanna performed 'What's My Name?' on the programme, while Aguilera played 'Express' backed by a troupe of scantily-clad dancers. Watch footage of Aguilera's performance by scrolling down and clicking below.

Broadcaster ITV also received more than 1,000 complaints about the programme.

The X Factor winner Matt Cardle yesterday (December 19) went straight to the top of the UK singles charts with 'When We Collide', his version of Biffy Clyro's 'Many Of Horror'.