Guest Stars Shay Mitchell as Herself Keke Palmer as Herself Nikki Garcia as Herself (Nikki Bella) Brandon Flynn as Himself Iggy Azalea as Herself Lorde as Herself K.J. Apa as Himself Lilly Singh as Herself Julia Michaels as Herself Camila Cabello as Herself Bea Miller as Herself Martha Hunt as Herself Niall Horan as Himself 4YallEntertainment as Themselves DNCE as Themselves Post Malone as Himself Imagine Dragons as Themselves Tyrone Edwards as Himself (Co-Host) Liz Trinnear as Herself (Co-Host) Jazz Cartier as Herself Arkells as Themselves Hedley as Themselves