Album: Red

You know you're doing something right when even goats are singing your song. "I Knew You Were Trouble" was the song we wanted to hate, but soon discovered it was pretty much biologically impossible to do so. The hilly, rollercoaster-ing vocals in the chorus ("I know you were trouble when you walked in/So shame on me now/Flew me to places I'd never been/ Now I'm lying on the cold hard ground") leads the listener like a lamb to a slaughterhouse into the dubstep breakdown. Even though it peaked at number 2 on the Billboard charts, we'll probably never forgive her for the "We Found Love" derivative video treatment. Be that as it may, Taylor Swift took a major risk when she traded her country girl cred for some sub-bass swag, and the result was pure popstep bliss. -Alysa Lechner