Independent but Mainstream? Corrine Bailey Rae
I love love love Corrine Bailey Rae. She is a soulful-jazz-rock-folk singer with indie roots. She is completely captivating on the stage and her art is brilliant. If you haven't checked her out yet, now is the time. I especially like "Put your Records On." What's really cool about her sefl-titled album, is that she wrote or co-wrote every tune on there and she also played guitar, keyboard and bass and percussion in a true DIY form that all of us indie musicians know and love.