The bucket list of one of rock's great balls-out frontpeople—Karen O, singer of the Yeah Yeah Yeahs—may not have included Grammy and Oscar nods for the same track. But that's what happened for "The Moon Song," from Spike Jonze's Her. She even performed it as a duet with Ezra Koenig at the 2014 Academy Awards. O then took a sharp left turn on Crush Songs, fifteen tunes featuring an acoustic guitar and her broken voice. It might be the most punk-rock thing she's done yet. Here, Koenig asks her about D'Angelo, risk-taking, and her selfies policy.