An overeager fan reached out and touched Justin Bieber's face as he was being driven to a show in Barcelona, Spain today.
The Biebs responded by punching the guy in the mouth hard enough to draw blood.
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Bieber's violent side has flared up before. He's pushed Desiigner, put a cig out on the arm of Post Malone and this summer he brawled with a pretty big dude in Cleveland.
In this case, Bieb's victim seemed pretty pleased to have been bloodied by pop royalty.