Jason Derulo: 'Undefeated' at American Idol!

Jason Derulo arrives at the American Idol 2012 Finale Results Show held at Nokia Theatre L.A. Live on Wednesday evening (May 23) in Los Angeles.

The 22-year-old musician joined girlfriend Jordin Sparks at the finale, which crowned Phillip Phillips as the winner.

“A deal is a deal. Phillip won AI, so I gotta cook din 4 @jordinsparks. I have 2 use a recipe & make the meal repeatedly til its right. HELP!” Jason tweeted about his bet with Jordin.

The night before, Jason hit the Idol stage to perform his new single, “Undefeated.” The track was created as part of Coca-Cola’s “Perfect Harmony” initiative, which called on regular, non-pop star people to help write the song by submitting lyrics, and then voting for their favorite fan-written lines to be incorporated into the tune.

10+ pics inside of Jason Derulo…