Guest Stars Selena Gomez as Herself Bebe Rexha as Herself Christina Aguilera as Herself Chadwick Boseman as Himself BTS as Themselves watt as Himself Zedd as Himself Khalid as Himself Demi Lovato as Themselves Pink as Herself Kelly Clarkson as Herself Hailee Steinfeld as Herself Diana Ross as Herself Niall Horan as Himself Alessia Cara as Herself Alesso as Himself Imagine Dragons as Themselves Portugal. The Man as Themselves Florida Georgia Line as Florida Georgia Line
