According to TMZ, the "Sorry" singer was in attendance at a party when a man who appeared to be on drugs entered and "went ballistic" after spotting a woman believed to be an ex-girlfriend. Justin was there with a friend and was speaking with some people when the guy in question walked in, saw the woman, and went off, sources close to the situation told the website.
Justin Bieber has been a lot of things in his short time on Earth: a pop-star, actor, celebrity church enthusiast, and now, Woman Protector. When he refused to listen Bieber allegedly punched him in the face and pushed him against a wall, causing him to lose his grip on the woman's throat.
The site goes on to say the man was then chucked out of the party but was seen chasing a auto that he believed had Bieber inside. He was screaming Justin's name as he began hitting the vehicle.
Bieber's camp has yet to confirm or deny reports of the incident.
Meanwhile, the singer has been spotted thoroughly enjoying himself at Coachella; rocking about the place in a very colourful outfit and being filmed by other festival-goers letting his hair down and having a dance.