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