Corbin Bleu: Johnny Collins (1) (Lilly, Do You Want to Know a Secret)
Paul Vogt: Dontzig (3) (Two Between Two Hannahs, Bad Moose Rising, and The Idol Side of Me)
Ashley Tisdale: Maddie Fitzpatrick (1, On the Open Road)
Lisa Arch: Liza (2, You're So Vain, You Probably Think This Zit is About You and Smells Like Teen Sellout)
Brooke Shields: Susan Stewart (2, I Am Hannah, Hear Me Croak and The Way We Almost Weren't)
Larry David: Himself (1, My Best Friend's Boyfriend)
Madison Pettis: Sophie Martinez (1, Take This Job and Love It!)
John D'Aquino: President Richard Martinez (1, Take This Job and Love It!)
Jesse McCartney: Himself (1, When You Wish You Were the Star)
Selena Gomez: Mikayla (2, I Want You to Want Me to Go to Florida and That's What Friends Are For)
Jonas Brothers: Themselves (1, Me and Mr. Jonas and Mr. Jonas and Mr. Jonas)
The Rock: Himself (1, Don't Stop 'Til You Get the Phone)
Heather Locklear: Heather Truscott (1, Lilly's Mom Has Got It Going On)
