We’ve known all of the guest judges on The X Factor for weeks now besides Britney’s, but wonder no more.

Britney’s guest judge on The X Factor is Will.I.Am, according to TVGuide.com.

Britney recently confirmed she’s appearing on his upcoming single, titled “**** ****.”

Nick Jonas will team up with Demi Lovato, Justin Bieber with LA Reid and Marc Anthony with Simon Cowell.

Performance???

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