The X Factor launched in 2004 in the UK. Airing on ITV1, The X Factor has been the No 1 show in the UK for eight years, with the 2010 finale achieving a peak of 21.2 million viewers, and a 65% share.

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The X Factor final was the UK's most watched show of 2010, viewing figures have suggested.

BBC: X Factor final 'most watched show of 2010'

Another name recently floating about for the Factor judges panel: "X Factor" UK judge Kelly Rowland.

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For anyone who has managed to avoid a television, newspaper, billboard, radio show or conversation for the last four months, the X Factor is one of the biggest TV shows in the UK. In the past, it has produced huge stars such as Leona Lewis and Alexandra Burke.

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The case followed a dispute between Fuller and Simon Cowell in 2004 over similarities between Fuller's American Idol and Cowell's UK show, The X Factor.

BBC: Simon Fuller settles US X Factor case

While X-Factor, remains by far the biggest regular hitter when it comes to TV-related tweets in the UK -- 3.7 million of the 38.7 million made about shows broadcast free-to-air on British television from April 1 to November 1 this year -- it is not just entertainment shows getting in on the act.

CNN: Tweets and apps give TV the X Factor