[Sam!]

The leaks are coming fast and furious from this year's X Factor set with details emerging of which group each of the judges will be mentoring, along with more information on who the special guest stars will be.

Today's Sun reports that Louis Walsh will be looking after the groups for the fourth time in his six series as an X Factor judge, while Simon Cowell will have the over-25s category for the first time since he guided Steve Brookstein to victory in the 2004 series. And look how that turned out!

The newspaper also claims that Cheryl will once again get the 16 to 25-year-old girls and Dannii will get the similar boys' category - interestingly, those are the categories that both Dannii and Cheryl won the series with in previous years.

Meanwhile, the show's choreographer Brian Friedman has revealed that Madonna and Robbie Williams will both be appearing on the live shows.

The pop superstars will be joined by Whitney Houston and Rihanna in what is going to be one of the most star-studded line-ups to date.

It's also been claimed that Kate Moss will be helping one of the judges to whittle down their last six acts to the final three.

The model is a big fan of the series and went along to watch several of last year's live shows. She is expected to join one of the judges at their 'home' for the final heat before the show enters the live stages.

http://uk.tv.yahoo.com/blog/article/235206/

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So it looks like it's

Simon: Over 25's
Louis: Groups
Dannii: Boys
Cheryl: Girls