When Diplo and Skrillex announced they would be joining forces as Jack U the internet exploded. They first performed as Jack U at Mad Decent Block Party, then it was announced they would be performing at Ultra Music Festival. To say their set on Ultra's main stage was insane would be an understatement. A beautiful marriage of both Diplo and Skrillex's sounds, Jack U sent the crowd into a frenzy with one of the biggest sets of Ultra Music Festival 2014.