Alt-J

Alt-J has been very popular on Tumblr for almost over a year now. The 'oil spill' album cover has been used and seen on blogs everywhere. They've been called the 'next Radiohead' by some music sites. Honestly I think that's pretty accurate, their music is subtle, background music, and sometimes slightly morose. Their most popular song is Breezeblocks. Alt-J recently played at Coachella, which just ended this week.