Guest Stars Adam Sandler as Himself Heidi Klum as Herself Jace Norman as Himself Selena Gomez as Herself Keke Palmer as Herself Robert Downey Jr. as Himself (Robert Downey, Jr.) JoJo Siwa as Herself Dove Cameron as Herself Zendaya as Herself Kira Kosarin as Herself Jack Griffo as Himself Kel Mitchell as Himself Chris Evans as Himself Rico Rodriguez as Himself Camila Cabello as Herself Ally Brooke as Herself Grant Gustin as Himself Debby Ryan as Herself Lizzy Greene as Herself Breanna Yde as Herself Benjamin Flores Jr. as Himself Josh Gad as Himself Nia Sioux Frazier as Herself Amy Poehler as Herself Sarah Hyland as Herself Ellen DeGeneres as Herself Lauren Jauregui as Herself Maddie Ziegler as Herself Bethany Mota as Herself Dinah Jane Hansen as Herself Normani as Herself Will Arnett as Himself Andy Samberg as Himself Anthony Anderson as Himself Chloe Bennet as Herself Jason Sudeikis as Himself Laura Marano as Herself Nick Jonas as Himself Meghan Trainor as Herself Casey Simpson as Himself Addison Riecke as Herself Diego Velazquez as Himself Cree Cicchino as Herself Mace Coronel as Himself Madisyn Shipman as Herself John Stamos as Himself Pharrell Williams as Himself Mackenzie Ziegler as Herself Kalani Hilliker as Herself Rob Gronkowski as Himself Brec Bassinger as Herself Aidan Gallagher as Himself Rosa Blasi as Herself Chris Tallman as Himself Thomas Kuc as Himself Adam Levine as Himself Buddy Valastro as Himself Wiz Khalifa as Himself (Performer) Kendall Vertes as Herself DNCE as Themselves (Performer) Neel Sethi as Himself Cameron Dallas as Himself Taylor Caniff as Himself Charlie Puth as Himself (Performer)