Dick Van Dyke

Self

Tichina Arnold

Self - Performer

Beth Behrs

Self - Performer

JoJo Siwa

Self - Performer

Jason Alexander

Self - Performer

'Weird Al' Yankovic

Self - Performer

Amanda Kloots

Self - Performer

Skylar Astin

Self - Performer

Amber Riley

Self - Performer

Rita Ora

Self - Performer

Rufus Wainwright

Self - Performer

Julie Andrews

Self

Lin-Manuel Miranda

Self

Judd Apatow

Self

David Archuleta

Self

Mel Brooks

Self

Carol Burnett

Self

Cedric the Entertainer

Self

Stephen Colbert

Self

Derek Hough

Self

David Copperfield

Self

Darren Criss

Self

Ted Danson

Self

Roma Downey

Self

Brad Garrett

Self

Mark Hamill

Self

Jenny McCarthy

Self

Tony Hawk

Self

Ken Jeong

Self

John Lithgow

Self

Rob Reiner

Self

Craig Robinson

Self

Jane Seymour

Self

William Shatner

Self

Martin Short

Self

Harry Shum Jr.

Self

Mary Steenburgen

Self

Stanley Tucci

Self