Justin Bieber -- Bloody Girl Fight as French Fans Rally (VIDEO)

Hundreds of girls gathered outside a radio station Thursday morning in Paris hoping to catch a glimpse of Justin Bieber ... but things turned ugly when a fight broke out leaving at least one girl bloody.

Bieber was promoting his big comeback single "What Do You Mean?" and of course his crazed fan base turned up en masse (that's French for big group).

Things got a little rough as the girls waited for Bieber to emerge ... and the pushing and shoving eventually turned into a brawl.