Guest Stars Sabrina Carpenter as Herself Olivia Rodrigo as Herself Cher as Herself Pentatonix as Themselves AJR as Themselves Melanie Martinez as Herself Niall Horan as Himself SZA as Herself OneRepublic as Themselves David Kushner as Himself Big Time Rush as Themselves Jelly Roll as Himself Doechii as Herself Paul Russell as Himself