Speculation is mounting that Cheryl Cole will be a judge on the US version of X Factor – and according to the papers she could receive a £10m payday.

The News Of The World reports that Simon Cowell has defied resistance from TV bosses in the US and assured her of a place on the panel – even though she is a complete unknown there.

And the paper adds that formal contract negotiations are due to begin next month.

“Simon is the boss of this show,” a source said. “He gets what he wants and he wants Cheryl. The money you make on American TV is huge, but there’s also a huge risk.

“The way American contracts are gives Fox the chance to opt out if viewers don’t take to her. But Simon won’t let that happen.”

The insider added that joining the judging panel would also act as a springboard for Cheryl to launch her music career across the Atlantic.

“As soon as it’s announced she’s going to be a judge the plan will be to launch her music career in the States,” the insider told the paper.

“It’s important Americans realise she’s a credible music star if she’s going to be judging other singers.”

Meanwhile, the paper also reports that Simon Cowell will take part in the next series in the UK despite speculation over the weekend he had threatened to quit.

However the Sunday Mirror reports that Cowell’s future on the show is still uncertain – and that he has lined up Robbie Williams to replace him on the judging panel.

The 36-year-old chart-topper is known to be a huge fan of the show and has appeared as a mentor and performer on several occasions.

“Robbie being on the panel is the talk of the show,” an insider told the paper. “They are now talking contracts and terms. Rob had been hoping this would happen and is excited about the prospect of joining the show.”

A spokeswoman for the show said that “no decisions” had yet been made about the final line-up of the panel.

The first advert for the US version of the series will appear on American network Fox today, during coverage of the Superbowl.