Charmed by Jack Johnson's sunny acoustic pop, these singer/songwriters likewise spread feel-good vibes. Brushfire labelmate Donavon Frankenreiter captures a similar summery warmth in upbeat '70s-inspired rock, while Colbie Caillat wraps Cali pop around a coo that seems to have been dipped in the same honey as Johnson's. That laidback spirit has even made it to London, in Michael Kiwanuka's retro soul.