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