Britney Spears will be in tip top shape as judge on the “X Factor”.

The popstar signed onto the show for a reported whopping $15 million – but first she must be get fit – and Simon Cowell will help her get there by filling up her dressing room with figs and prunes.

A source told the Daily Star newspaper:

“He promised to fill her dressing room with them. That’ll make her ‘regular’ now.”

On top of having healthy snacks in the dressing room, she’ll also be on a six-week course of intensive training.

A source said:

“Britney has to look picture perfect, even during downtime. Simon has laid down the law – he’s paying for ‘superstar Britney’ not the ‘trailer trash’ version she’s occasionally become known as.

“Her people have promised she will be transformed. She’ll be glammed up, slimmed down and totally focused on the show

“Her diet includes lots of protein and superfoods to helps speed up her metabolism. The plan is to keep her full in between meals with vitamin juices, so she doesn’t get hungry and grab junk food.”

Can’t wait to see her on the show!

Photos by FameFlynet