Madge, Robbie to appear on The X Factor?

London, Aug 13: Madonna and Robbie Williams may appear in the new series of The X Factor as mentors to selected contestants.

The show's choreographer Brian Friedman reportedly revealed that the Queen of Pop, apart from Whitney Houston and pop sensation Rihanna, would help participants fight it out on the finals of the show.

"Brian is really excited about this year's show because there are some great artists involved," the Sun quoted a source as saying.

Friedman is apparently delighted as TV mogul and producer Simon Cowell could bring in such big names to the show.

The insider said: "He is proud to be part of it and admires Simon's ability to attract A-listers."

Some of the other figures who have appeared on the show in the past are boyband Westlife, Take That's Gary Barlow and Mark Owen and R'n'B star Beyonce.

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