It’s official! Britney Spears is officially a judge on X-Factor, alongside singer Demi Lovato! More details below.

Marisa Mendez

Cowell just tweeted a photo of himself with Britney, L.A. Reid and the show’s 4th judge Demi Lovato (pictured hovering awkwardly over Simon’s shoulder).

Simon included a message with the pic — “Can’t believe it’s finally happened. Very exciting!”
FOX just made the announcement at the Upfronts in NYC — where advertisers vie for commercial airtime on TV shows “up front” … several months before the shows actually premiere.

As we reported, negotiations between Britney and “X Factor” honchos went right down to the wire. Britney’s conservators — her fiance Jason Trawick and her dad Jamie Spears — signed the $15 million deal on her behalf.

tmz