Guest Stars Dua Lipa as Herself Taylor Swift as Herself Shawn Mendes as Himself Jennifer Lopez as Jennifer Lopez Halsey as Herself Camila Cabello as Herself Post Malone as Himself Khalid as Himself Zedd as Himself Mariah Carey as Herself Cardi B as Herself Liza Koshy as Herself Panic! at the Disco as Themselves Brendon Urie as Himself The Chainsmokers as Themselves