Upfronts 2012: Britney Spears and Demi Lovato officially join 'X Factor'

It's true, "The X Factor" fans. Britney and Demi are jumping on board.

Fox announced at its upfront presentation that Britney Spears and Demi Lovato are officially joining Simon Cowell and L.A. Reid on the judge's panel of the singing reality series.

The singers joined Cowell and Reid on stage in New York, and both said they were thrilled to join the series. “I'm ready to find the true star,” Spears said, while Lovato said she was "stoked."

Cowell tweeted a photo of himself with the judges, after the jump.

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— Greg Braxton

Photo: Britney Spears. Credit: Vince Bucci / Associated Press.