Name	Known for
Wayne Brady Self - Host Self - Host See fewer	Whose Line Is It Anyway? (1998)
Sebastian Bach Self - Musical Guest Self - Musical Guest See fewer	Rock of Ages (2012)
Boyz II Men Themselves Themselves See fewer	The Wall (II) (2017)
David Foster Self - Judge Self - Judge See fewer	St. Elmo's Fire (1985)
Chris Jericho Self Self See fewer	MacGruber (2010)
Gladys Knight Self - Musical Guest Self - Musical Guest See fewer	Hollywood Homicide (2003)
Lucy Lawless Self Self See fewer	Xena: Warrior Princess (1995)
Little Richard Self - Judge Self - Judge See fewer	Predator (1987)
Cheech Marin Self - Musical Guest Self - Musical Guest See fewer	Born in East L.A. (1987)
Renée O'Connor Self Self See fewer	A Question of Faith (2017)
Marie Osmond Self - Judge Self - Judge See fewer	Donny and Marie (1975)
Carly Patterson Self Self See fewer	Stick It (2006)
Alfonso Ribeiro Self Self See fewer	The Fresh Prince of Bel-Air (1990)
Smokey Robinson Self - Musical Guest Self - Musical Guest See fewer	Big Time (1977)
Jai Rodriguez Self Self See fewer	The Producers (2005)
Hal Sparks Self Self See fewer	Queer as Folk (2000)
Lea Thompson Self Self See fewer	Back to the Future (1985)