Justin Bieber has undergone a style revolution over the past few years. Gone is the baby-faced boy with the mop top haircut, but with his edgy new style and tattoos, the Biebs has certainly come a long way! Judging by his latest Instagram pictures, Justin also seems to be taking a few style lessons from other stars, like when he rocked a backwards baseball cap with Calvin Klein underwear—an obvious throwback to Mark Wahlberg during his Marky Mark and the Funky Bunch days!
