Justin Bieber is at it again, this time he punched a fan in the mouth, while in Barcelona. 

As Bieber was making his way to the arena, a fan reached into the singer's car and apparently got too close to Justin. That's when the entertainer unleashed and punched this fan in the mouth.

The fan retreated and he was left with a busted lip. He immediately ran over to friends and couldn't wait to show his friends the aftermath of his confrontation.

Now, let's sit back and wait to see if this fan presses charges on Bieber.

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