A spoof video of the X Factor finalists and Susan Boyle singing 'Killing In The Name' has been posted on Youtube.

The absolutely hilarious clip sees stars including Jedward, Olly Murs, Joe McElderry and Simon Cowell singing along - via superimposed mouths - to the 1992 rock anthem.

For those of you who have been living on Mars for the last week, 'Killing In The Name' is competing with Joe McElderry's 'The Climb' for the Christmas number one spot.

A source told Gigwise today that the track has opened up a 65,000 strong sales lead over the X Factor winner.