‘X Factor’ Finale Performances: 50 Cent, Leona Lewis, Justin Bieber, & Pitbull

50 Cent invaded Thursday’s “X Factor” finale with a super-sized performance. First up, the G-Unit general debuted “Wait Until Tonight,” a cut off his mixtape The Big 10, live for the first time. He also took it back, linking up with eliminated contestant Astro for “In Da Club” as the show’s judges and members of the L.A. Lakers danced onstage.

British “X Factor” champ Leona Lewis wowed with her cover of Snow Patrol’s “Run,” Pitbull got the party started with “International Love” and “Give Me Everything” with Ne-Yo, and Justin Bieber spread some holiday cheer with Stevie Wonder.

Pitbull – “International Love” + “Give Me Everything” with Ne-Yo

Leona Lewis – “Run”

Justin Bieber – “The Christmas Song” with Stevie Wonder + “Santa Claus Is Coming to Town”