Jenny Lewis and Johnathan Rice are, by all indications, a happy indie-rock power couple. But you wouldn't know it from I'm Having Fun Now. In their solo work, Lewis and Rice are bards of the bummer, and these shapely power-pop numbers are no exception: songs about hard times ("Big Wave") and troubled romances ("Scissor Runner"), with Lewis and Rice often trading lines as if they're arguing. The mood may be dark, but the record is a model of musical egalitarianism. J&J's vocals blend beautifully throughout — sweet harmony that makes discord go down easy.

“I'm Yours”

Jason Mraz re-emerged after his disappointing second album with this lead single, a Jack Johnson-esque ditty about giving yourself fully to someone else. The success of the reggae-tinged song (it earned two Grammy nods and a spot on the Billboard singles chart for well over a year) was something the folk-pop singer never predicted when he wrote it in 15 minutes at home. "I played a happy-hippie chord progression that would probably work without 50 different Bob Marley songs," he told Rolling Stone. "I thought, 'It's too novelty. This is a nursery rhyme,'" concluding that "you can never guess what's gonna be a hit."