Caroline Flack has revealed that Robbie Williams is appearing on the X Factor this weekend and that he has been arguing with Gary Barlow about Rylan Clark.

"I know that Robbie Williams is on the show on Sunday and I know he has been visiting the X Factor contestants already," said Caroline.

"Robbie is the biggest Rylan fan. He absolutely adores Rylan. He says that being in the show is all about being an entertainer, whereas Gary doesn't want that this year.

"I quite like the way there is a little bit of rivalry going on between them again."