Britney Spears is signed, sealed and delivered.

E!Online reports that, following months of eight-figure negotiations, the pop star has finally signed her contract to join Simon Cowell and L.A. Reid as a judge on The X Factor.

Spears finally inked her deal this week, E! News has exclusively confirmed.

Britney will get $15 million for one season's worth of work. She had agreed in principle to the deal weeks ago and had spent the last several days working out the fine print.

"The contract is signed," reveals source close to the star. "There's been a lot of back and forth over the past few weeks as they negotiated the small details, but she's on. It's all completed and Britney is beyond excited."

Still no official word on a fourth judge – or – a new host/hosts for the program.


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