Justin Bieber Stops Crowd Fight At Own Concert .

A Justin Bieber concert on the weekend got so out of hand the star himself had to stop the show in order to prevent an ugly fight breaking out between crowd members.

The 'Pray' singer was in Barcelona as part of his European tour when a crazy fight broke out between fans during a song.

The pop phenomenon had to stop the show completely and ask the fans to "stop" several times before they eventually calmed down and he could continue the show.

Do YOU think fans need to calm down at his concerts, or should they be able to go crazy?

Check out Bieber doing his best 'crowd control' below...