| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Phil McIntyre | Crew | Production | Executive Producer | 19 |
Graham Barclay | Crew | Sound | Sound Editor | 36 |
Jennifer Mullin | Crew | Production | Executive Producer | 19 |
Trish Kinane | Crew | Production | Executive Producer | 19 |
 Ben Harper | Cast | Actor | Self | 1 |
 Jason Mraz | Cast | Actor | Self | 1 |
 Jewel | Cast | Actress | Self | 1 |
 Lea Michele | Cast | Actress | Self - Special Guest | 1 |
 Lionel Richie | Cast | Actor | Self - Judge | 121 |
 Lukas Forchhammer | Cast | Actor | Self | 1 |
 Neil Giraldo | Cast | Actor | Self | 1 |
 Ryan Seacrest | Cast | Actor | Self - Host | 121 |
 Shaggy | Cast | Actor | Self | 1 |
 Adam Lambert | Cast | Actor | Self | 2 |
 Brandon Boyd | Cast | Actor | Self | 1 |
 Brian Bell | Cast | Actor | Self | 1 |
 Carrie Underwood | Cast | Actress | Self | 1 |
 Daddy Yankee | Cast | Actor | Self | 1 |
 Josh Groban | Cast | Actor | Self | 1 |
 Joss Stone | Cast | Actress | Self | 1 |
 Katharine McPhee | Cast | Actress | Self | 1 |
 Rivers Cuomo | Cast | Actor | Self | 1 |
 Tori Kelly | Cast | Actress | Self | 1 |
 Colbie Caillat | Cast | Actress | Self - Special Guest | 1 |
 Katy Perry | Cast | Actress | Self - Judge | 123 |
 Luke Bryan | Cast | Actor | Self - Judge | 121 |
 Rebel Wilson | Cast | Actress | Self | 1 |
 Ryan Tedder | Cast | Actor | Self | 1 |
 Nick Merico | Cast | Actor | Self | 1 |
 PJ Morton | Cast | Actor | Self | 1 |
 Cynthia Erivo | Cast | Actress | Self | 1 |
 Bebe Rexha | Cast | Actress | Self - Special Guest | 1 |
 Brian McKnight | Cast | Actor | Self | 1 |
 Montell Jordan | Cast | Actor | Self | 1 |
Maddie Poppe | Cast | Self - Contestant | 1 | |
 Patrick Wilson | Cast | Actor | Self | 1 |
 Andra Day | Cast | Actress | Self | 1 |
 Elle King | Cast | Actress | Self | 1 |
Shay Mooney | Cast | Self | 1 | |
Dan Smyers | Cast | Self | 1 | |
Brett Young | Cast | Self | 1 | |
 Jason Aldean | Cast | Actor | Self | 1 |
 Kane Brown | Cast | Actor | Self | 1 |
 Pat Benatar | Cast | Actress | Self | 1 |
 Bobby Bones | Cast | Actor | Self - Mentor | 121 |
 Julia Michaels | Cast | Actress | Self | 1 |
 Allen Stone | Cast | Self - Special Guest | 1 | |
 Hannah Brown | Cast | Self | 1 | |
Mitchy Collins | Cast | Actor | Self | 1 |
 Laine Hardy | Cast | Actor | Self | 13 |
VoKillz | Cast | Self | 1 | |
Walt Anderson | Cast | Self | 1 | |
 Scott Shriner | Cast | Actor | Self | 1 |
Jon Pardi | Cast | Self | 1 | |
 Gabby Barrett | Cast | Actress | Self | 1 |
Caleb Lee Hutchinson | Cast | Self | 1 | |
Sam Price | Cast | Actor | Self | 1 |
Jordan Greenwald | Cast | Actor | Self | 1 |
Riley Thompson | Cast | Self | 7 | |
Kate Barnette | Cast | Self | 5 | |
Ryan Hammond | Cast | Self | 5 | |
Madison VanDenburg | Cast | Self | 13 | |
Evelyn Cormier | Cast | Self | 7 | |
Alyssa Raghu | Cast | Self | 11 | |
Ashley Hess | Cast | Self | 8 | |
Eddie Island | Cast | Self | 8 | |
Laci Kaye Booth | Cast | Self | 13 | |
Walker Burroughs | Cast | Self | 11 | |
Alejandro Aranda | Cast | Self | 13 | |
Uché | Cast | Self | 10 | |
Dimitrius Graham | Cast | Self | 9 | |
Lauren Daigle | Cast | Self | 1 | |
Shayy | Cast | Self | 1 | |
Jeremiah Lloyd Harmon | Cast | Self | 12 | |
Raquel Trinidad | Cast | Self | 4 | |
Logan Johnson | Cast | Self | 6 | |
Shawn Robinson | Cast | Self | 6 | |
Wade Cota | Cast | Self | 12 | |
Bumbly | Cast | Self | 5 | |
Avett Maness | Cast | Self | 1 | |
Amelia Hammer Harris | Cast | Actress | Self - Contestant | 5 |
 Jimmie Allen | Cast | Actor | Self | 1 |
 Ava August | Cast | Actress | Herself | 19 |
Claudia Conway | Cast | Self | 1 | |
Louis Knight | Cast | Actor | Self - Contestant | 4 |
 Ben Rector | Cast | Self | 1 | |
 Ada Vox | Cast | Actor | Self - Contestant | 10 |
 Cam | Cast | Actress | Self - Special Guest | 1 |
Marcio Donaldson | Cast | Self - Contestant | 1 | |
Effie Passero | Cast | Self - Contestant | 1 | |
Shannon O'Hara | Cast | Self - Contestant | 1 | |
Mara Justine | Cast | Self - Contestant | 1 | |
 Banners | Cast | Actor | Self - Special Guest | 1 |
Garrett Jacobs | Cast | Self - Contestant | 1 | |
Ron Bultongez | Cast | Self - Contestant | 1 | |
Jurnee Siani | Cast | Self - Contestant | 1 | |
 Rachel Platten | Cast | Actress | Self - Special Guest | 1 |
| Person | Type | Job | Role(s) | Episodes |
