5 Seconds of Summer, Ashton Irwin, Michael Clifford, Luke Hemmings, Calum Hood, Becca Tilley, Dot Jones with Bridgett Casteen and Savannah Parham and guest, Laura Marano, Hailee Steinfeld, Shawn Hook, Chris Harrison with kids, Jiff the dog, Chloe Grace Moretz, Maika Monroe, Alex Roe, Ellie Goulding, Kenya Moore, Kiernan Shipka, Tove Lo, Brad Goreski, Aubrey Anderson Emmons, Zedd, Jennifer Grey, Tinashe, One Direction, Niall Horan, Harry Styles, Louis Tomlinson, Liam Payne, Kym Johnson with Robert Herjavec, Shawn Mendes, Camila Cabello, Kathy Griffin, Kyle Richards, DNCE, Jack Lawless, Jin Joo, Joe Jonas, Cole Whittle, Selena Gomez, Ryan Seacrest, Sisanie,
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Performances:
5 Seconds of Summer, Ashton Irwin, Michael Clifford, Luke Hemmings, Calum Hood, Ellie Goulding, Hailee Steinfeld, Zedd, One Direction, Niall Horan, Harry Styles, Louis Tomlinson, Liam Payne, Shawn Mendes, Camila Cabelllo, Selena Gomez, The Weeknd,
