'The X Factor' becomes most criticised show on ITV

Ofcom – the independent regulator for the communications industry – has been swarmed with more than 5,000 complaints throughout 'The X Factor' series, including 2,000 from viewers concerned about Christina Aguilera's raunchy performance on the family show.

ITV bosses are now said to be worried allegations of "sleaze" - which have marred 'The X Factor' since the series began in August - could damage the reputation of the channel for good, and have reportedly told Simon Cowell to tone it down when 'Britain's Got Talent' begins next year.