What happens when One Direction have a dance party?

A lot of finger snapping, some gyrating and a lot of giggling. In a grainy clip from rehearsals, Liam Payne, Louis Tomlinson and Harry Styles crooned along to 'C'mon, Cm'on' off of 'Take Me Home' and showed off their best moves. While Liam appears to be the best actual dancer (something he claimed to Seventeen) and has a signature move called "The Joe," Louis may be the most entertaining and interpretive with his own moves. As for the most sheepish? See Harry leaping behind a couch.