David Cook
Always Be My Baby
It's Mariah Carey week, so the divas have the unfair advantage this week, right? Wrong. As long as the producers didn't saddle him with a cheesy karaoke arrangement, anything David C. did with a Mariah song was going to seem like genius. He delivers—and how—turning this bubblegum single into an angsty rock anthem. Fairly or not, it's easily the most memorable and iTunes-worthy song of the night.
— by James Poniewozik