Justin Bieber punches fan who tried to touch him in Barcelona

'I touched his face like this and he went, 'Boom',' says the fan

The unnamed young man then approaches the camera with blood running from his mouth (YouTube / TMZ)

From recently storming off stage in Manchester after demanding the crowd stop screaming between songs, to saying he hoped Anne Frank would have been a Beibeler, to strolling barefoot through Boston, Justin Bieber is nothing if not unpredictable.

In his latest controversy, the pop singer has been film apparently punching a fan in Barcelona.

In a video obtained by TMZ, a man can be seen leaning into a moving vehicle while seemingly touching the 22-year-old’s face. Footage appears to show the Canadian responding by punching him.

After the incident, the unnamed young Spanish man can be viewed holding his face before approaching the camera with blood running from his mouth.

“I touched his face like this and he went, 'Boom',” he can then be heard saying in Castilian Spanish.

Bieber was performing in the city as part of the European leg of his Purpose tour.

Last month, Bieber prompted anger among some fans when he stormed off stage in Manchester after demanding the crowd stop screaming in the gaps between songs. After returning to the stage last Monday, the singer went as far as to suggest Manchester could not “handle it”.

“The screaming in these breaks has got to stop,” he said prior to his dramatic departure. “Please and thank you. I don't think it's necessary when I'm trying to say something and you guys are screaming.”

A representative for Bieber did not immediately respond to request for comment.