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Complaints about Christina Aguilera and Rihanna's recent performances on The X Factor have continued to rise.

Over 2000 viewers have now lodged a complaint about both artist's performances, which featured skimpy outfits and raunchy dance routines.

An Ofcom spokesperson said they were assessing the complaints but are not currently investigating the show.

Despite the complaints, last weekend's final was the most popular edition of The X Factor in its history with over 17 million views.

Meanwhile, winner Matt Cardle is on course top take the Christmas number one spot with debut single 'When We Collide', a cover of Biffy Clyro's 'Many Of Horror'.