Guest Stars Ed Sheeran as Himself Ryan Seacrest as Himself Pitbull as Himself Selena Gomez as Herself Shakira as Herself Adam Lambert as Himself Joe Manganiello as Himself Jared Leto as Himself Jennifer Lopez as Herself Hilary Duff as Herself Ariana Grande as Herself Ashley Greene as Herself Gwen Stefani as Herself Blake Shelton as Himself Usher as Himself Lionel Richie as Himself Pharrell Williams as Himself Mel B as Herself 30 Seconds to Mars as Themselves Kesha as Herself Sean Combs as Himself (Sean "Diddy" Combs) Lil' Jon as Himself Luke Bryan as Himself Arcade Fire as Themselves Chester Bennington as Himself Kendrick Lamar as Himself Bastille as Themselves Juanes as Himself G.R.L. as Themselves Juicy J as Himself L.A. Reid as Himself Dan Reynolds as Himself Jason Reader as Himself Bobby Bones as Himself