Previously announced stars appearing include Bryan Cranston, Blake Shelton, Gwen Stefani, OneRepublic, Jim Gaffigan, Ellie Goulding, Tony Hale, Noah Jupe, Mario Lopez, Steve Martin and the Steep Canyon Rangers, Ray Romano, Lilly

Previously announced stars appearing include Bryan Cranston, Blake Shelton, Gwen Stefani, OneRepublic, Jim Gaffigan, Ellie Goulding, Tony Hale, Noah Jupe, Mario Lopez, Steve Martin and the Steep Canyon Rangers, Ray Romano, Lilly Singh, Sam Smith, James Taylor, Meghan Trainor, Milo Ventimiglia and Broadway star Adrienne Warren.