Anger management, perhaps? If so, we're glad Biebs is taking out his aggression at the gym, and not on his fans!

On Saturday Justin Bieber hit the boxing gym in Los Angeles, and he emerged soaked in sweat -- and looking just as good as ever! Biebs wore his thin-rimmed glasses on the way in to his workout, but we didn't see them on the way out, so we're wondering if they're just a fashion accessory.

While Bieber has been very good about exercising and staying out of trouble since he's been back in LA, he was creating a bit of drama on his Purpose tour prior to that. After calling Instagram "the devil" and punching a fan in the face in Spain, hopefully he's working out all of his issues when he throws punches at the gym!

As you may remember, Biebs was seen riding in the back of a car in Barcelona when an excited male fan reached into the back of the vehicle, where Bieber was seated. Seconds later, video captured an arm punching out from the backseat of the car and striking the fan in the mouth, causing him to bleed. We get that everyone needs their space, but that's not OK!