The Season 1 finale covers 1980-2005 and features Celine Dion ("My Heart Will Go On"), Richard Marx ("Don't Mean Nothing"), Colin Hay ("Down Under"), Adam Lambert (George Michael's "Faith") and Nelly ("Ride Wit Me" and "Hot in Herre"). Also: a Whitney Houston tribute by Ariana Grande; a hip-hop tribute by Flo Rida; collaborations by Sheryl Crow and Kelsea Ballerini ("All I Wanna Do"), and Smash Mouth and Hunter Hayes ("All Star").

• LL Cool J
• Tori Kelly
• Cee Lo Green