Lianne La Havas went from Paloma Faith's backup singer to an R&B leading lady thanks to her stunning 2012 debut, Is Your Love Big Enough? (an iTunes UK Album of the Year). Strapping on an acoustic guitar, she bared a neo-soul that's tough and tender, wise and young. But don't box her in—worldly and sophisticated, she keeps pushing the genre's boundaries. No wonder Prince is a fan.