Several roasters, and the master himself Kevin Hart, make fun of Justin Bieber.
Justin Bieber
Himself
Kevin Hart
Himself (Roastmaster)
Martha Stewart
Herself
Natasha Leggero
Jeff Ross
Hannibal Buress
Chris D'Elia
Pete Davidson
Shaquille O'Neal
Ludacris
Snoop Dogg
Will Ferrell
Ron Burgundy / Himself
Joel Gallen
Director
Benji Aflalo
Writer
Josh Comers
Michael Ferrucci