The Rundown: Mariah Carey, Me. I Am Mariah...The Elusive Chanteuse
"You Don't Know What to Do" Featuring Wale
With the chords of the piano, it sounds like this will be another amazing Mariah ballad, but then Wale comes in with "sing baby, baby sing" and by the time the beat drops it's clear that this is a fun-loving dance song. The old-school thump ignites a roller-rink feel, and Wale's poetic flow adds the right amount of turn-up.
(Photos from left: Jason Kempin/Getty Images for BET, Jason Merritt/Getty Images For BET)