The Knife

Made famous by Jose Gonzales' cover of its 2002 song 'Heartbeats,' this eccentric Swedish electronic duo wouldn't even make public appearances until recently, but they have since set aside their reluctance to perform in exchange for disguising themselves with curious things like medieval birds' beaks and Venetian masks. Last year, the group put on live shows that can be summed up in five words: Blue Man Group for Hipsters.