Guest Stars Radio City Rockettes as Themselves Pentatonix as Themselves Alec Baldwin as Himself Dolly Parton as Herself Kate McKinnon as Herself Josh Groban as Himself Trisha Yearwood as Herself Tony Bennett as Himself Garth Brooks as Himself Sarah McLachlan as Herself The Roots as Themselves Neil Diamond as Himself Tori Kelly as Herself Jordan Smith as Himself Anthony Hamilton as Himself HamilTones as Themselves