If inoffensiveness were a crime, Jason Mraz would be walking the Green Mile. While his light-hearted adult-pop relies on more empty platitudes than a post-game sports interview, you can almost overlook it because it's delivered with such carefree innocence. Before his reggae-lite hit "I'm Yours," he was living the life of a confessional contemporary pop clone of Dave Matthews, somewhere alongside Gavin DeGraw and Matt Nathanson. It's no surprise then, that, his latest, Love Is a Four Letter Word, not only repeats the obvious but also reprises the beachy world-beat undertone of his runaway hit. With Christine Perri. —Chris Parker