Guest Stars Taylor Swift as Herself Justin Timberlake as Himself Ryan Seacrest as Himself Meghan Trainor as Herself Chris Brown as Himself Florida Georgia Line as Themselves Jason Derulo as Himself Zendaya as Herself (Zendaya Coleman) Ludacris as Himself Jeremy Piven as Himself Reba McEntire as Herself Taraji P. Henson as Herself (Taraji Henson) Rihanna as Herself Brittany Snow as Herself 5 Seconds of Summer as Themselves Iggy Azalea as Herself Anna Camp as Herself Madonna as Herself Gina Rodriguez as Herself Steven Yeun as Himself Kelly Clarkson as Herself Nick Jonas as Himself Ian Ziering as Himself Snoop Dogg as Himself Billy Eichner as Himself Jennifer Hudson as Herself Mike Tyson as Himself Charlie Wilson as Himself Nick Simmons as Himself Tom Ford as Himself Alesso as Himself Nate Ruess as Himself Sam Smith as Themselves Jason Aldean as Himself Ryan Tedder as Himself