Justin Bieber

Ryan Good

Usher

Pattie Mallette

Jeremy Bieber

Mike Posner

Max Martin

will.i.am

Rodney Jerkins

Alfredo Flores

Kenny Hamilton

Ellen DeGeneres

John Brooks

Ryan Seacrest

Kuk Harrell

Jon M. Chu

Nick DeMoura

Nicki Minaj

Allison Kaye

Big Sean

Bruce Dale

Zach Galifianakis

Matt Lauer

Miles Brown

Ludacris

Jaxon Bieber

Jazmyn Bieber

Daniel Kanter

DJ Tay James

Reginald Jones

Melvin Baldwin

Bernard Harvey

Michael D. Brown

Vernon Burris Jr.

Brandon Winbush

Laura Edwards