Producer: Bangladesh, Dr. Luke, Benny Blanco
Album: Cannibal
Label: RCARap fans realized Andre 3000 had stolen Busta Rhymes's crown as the all-time guest-verse champ sometime back in 2007, after he bodied Unk's "Walk It Out" and Rich Boy's "Throw Some D's" and that jaw-dropping intro to UGK's "International Players' Anthem."

Teenie-boppers, though, didn't get their proof til a few years later, when he hopped on the drums of this gum-snapping pop hit and told Ke$ha a tender remembrance of growing up through divorce. "She say, 'Stacks, you're true-blue,'" he rhymed, confounding expectations as usual. "Nah, I'm navy..." —Dave Bry