Karen O and Ezra Koenig

Karen O, the Yeah Yeah Yeahs' frontwoman, began branching out from her group soon after its debut album, 2003's Fever to Tell. She loaned her vocals to "Hello Tomorrow," a 2005 collaboration with producer Squeak E. Clean that provided the soundtrack to a Nike commercial directed by Spike Jonze. In 2008, she debuted Native Korean Rock, which featured a softer, folkier sound. That year, it was announced that O would provide the soundtrack to Jonze's film adaptation of Where the Wild Things Are; for the project, she recruited Carter Burwell, her Yeah Yeah Yeahs bandmates, and mem...