Simon Cowell Says Britney Spears Tried to Quit 'X Factor' on Her First Day TMZ

Pop superstar Britney Spears had what is being described as a panic attack on her first day of production for Fox’s “The X Factor” and tried to get out of her $15 million job, reports.

The story cites Simon Cowell saying Spears, who was hired as one of the show’s judges, tried to quit the show -- and staffers for the show "half-lied" when they told the media that Spears left the set because she had to use the bathroom.

"No one is going to admit that on the first day your highest-paid star after 20 minutes has walked off set," Cowell told the website. He added that Spears "had a moment on the first day where she said to me, 'I'm not sure I can do this.'"

Cowell said he talked her back onto the show and that she's now loving her role -- and has become a solid judge.

The report adds: “Cowell also blasted his rivals at ‘The Voice’ ... claiming ‘Voice’ honcho Mark Burnett was full of crap when he told TMZ he had no idea NBC moved his show to Wednesday night, where it will go head-to-head with ‘X Factor.’"