Photos: See all of Justin Bieber's ab-tastic Calvin Klein ads

Justin Bieber's Nighttime Studio Session

Justin Bieber - Wikipedia

Justin Bieber - Wikipedia

Justin Bieber Reveals His Ab-tastic Calvin Klein Workout, But Did

Justin Bieber Reveals His Ab-tastic Calvin Klein Workout, But Did

Photos: See all of Justin Bieber's ab-tastic Calvin Klein ads

Photos: See all of Justin Bieber's ab-tastic Calvin Klein ads

Justin Bieber flaunts his bits for Calvin Klein ad

24/7 friendly Customer Service Calvin Klein - Mark Wahlberg in a 1992 advertising campaign for Calvin Klein Underwear., calvin klein ad