Guest Stars Demi Lovato as Themselves Justin Timberlake as Himself Ed Sheeran as Himself Florida Georgia Line as Themselves Jason Derulo as Himself Sabrina Carpenter as Herself Miley Cyrus as Herself Karrueche Tran as Herself Ansel Elgort as Himself Joe Jonas as Himself Shawn Mendes as Himself Katy Perry as Herself Halsey as Herself Bruno Mars as Himself Thomas Rhett as Himself John Legend as Himself Kelsea Ballerini as Herself Daya as Herself Chris Martin as Himself Noah Cyrus as Herself Dreezy as Herself Sean Paul as Himself Kayla Brianna as Herself Ty Dolla $ign as Himself Regulo Caro as Himself Joss Favela as Himself J Balvin as Himself Hey Violet as Themselves Granger Smith as Himself Sleeping With Sirens as Themselves Sofia Reyes as Herself Gerardo Ortiz as Himself DJ Snake as Himself CNCO as Themselves Cheyo Carrillo as Himself Adriel Favela as Herself The Chainsmokers as Themselves Fat Joe as Himself DJ Khaled as Himself Chris Lane as Himself The Strumbellas as Themselves Prince Royce as Himself Carlos Rivera as Himself French Montana as Himself Labrinth as Himself Macklemore as Himself Big Sean as Himself