Justin Bieber ditched his shirt for a jog around LA on Wednesday afternoon. The singer, who recently crushed hearts after he deactivated his Instagram, showed off his chiseled abs and tattooed body while hitting the pavement in a pair of basketball shorts and a blue bandana. Earlier this week, Justin returned stateside after jetting off to Mexico to celebrate his girlfriend Sofia Richie's 18th birthday. While there, the duo did not hold back when it came to showing PDA. Things got so hot and heavy between the two that at one point, Justin even pulled down his board shorts and bared his butt. Talk about steamy!