Guest Stars Bebe Rexha as Herself Kelly Clarkson as Herself Alicia Keys as Herself Charlie Puth as Himself Chris Blue as Himself Bastille as Themselves Demi Lovato as Themselves Billy Ray Cyrus as Himself Vince Gill as Himself Jessie J as Herself N.E.R.D. as Themselves Norah Jones as Herself Drew Pinsky as Himself Billy Idol as Himself Sia as Herself Steve Stevens as Himself
