Ellen DeGeneres
Self (archive footage)
Whoopi Goldberg
Self
Judy Garland
Dorothy Gale (archive footage)
Heidi Klum
Glen Ballard
Avril Lavigne
Russell Brand
Johnny Wujek
Shannon Woodward
Alan Carr
Katy Perry
Britney Spears
Alanis Morissette
Rihanna
Rachael Markarian
Justin Bieber
Darren Criss
Aaron Christopherson (archive footage)
Adele
Lucas Kerr
Mia Moretti
Adam Marcello
Patrick Matera
Max Hart
Jessie J
Rebecca Black
Dermot O'Leary
Bonnie McKee
Erica Hill
Chris Wragge
Kesha
Angelica Cob-Baehler
Jason Flom
Lexie Contursi
Baz Halpin
Joshua Moreau
Lauren Allison Ball
Casey Hooper
Leah Adler
Lockhart Brownlie
Bryan Gaw
Malik Le Nost
Scott Myrick
Cassidy Noblett
Steven Jensen
Bradford Cobb
Anthony Burrell
Brandee Evans
Ashley Ashida Dixon
Todd Delano
Lauren Christy
Scott Spock
Graham Edwards
Tasha Layton
Tamra Natisin
Angela Hudson
Ann Hudson
David Hudson
Keith Hudson
Mary Hudson
Mark Hunter