The L.A. DJ and his Jack U teammate Diplo took the stage with a slew of stars from their recent album.
After a weekend of surprise guests that included Usher and Ariana Grande, Skrillex topped off his headlining set at Miami's Ultra Music Festival with Justin Bieber, Diplo, Kiesza, Diddy, and South Korean vocalist CL of 2NE1.
Ultra has a long history of surprise guests. In 2012, Madonna made an unforgettable cameo during Avicii's headlining set in which she asked the audience how many of them had seen molly (disappointing deadmau5, among others). And last year, Diplo brought out Riff Raff, Wacka Flocka and Sean Paul. This year's crashers were teased throughout the weekend by the festival's main stage MC, who also announced that Ultra will be expanding to Singapore, adding to its roster of events in Croatia, South Africa and Japan.