BBC Introducing alumni Alt-J get their intriguing name from the actions needed to type a triangle on your computer. A four-piece that met at Leeds University, they've gained a reputation for intelligent pop music full of film references and geek outs, especially demonstrated in single Tessellate where lead singer Joe Newman attempts the impossible in making geometry sexy.

The 2012 recipients of the Mercury Music prize, the boys have exploded on to the scene since single Breezeblocks was released last March. This will be their debut Big Weekend performance, but after stunning performances in the Live Lounge - including an intriguing Kylie/Snoop Dogg cover - we expect great things from the hottest group around right now.