A Justin Bieber Birthday Card, from Billboard.com

We all know the girls go wild for Justin Bieber, but just how crazed do they get? At a recent concert in Pittsburgh, Bieber had to stop his hit "Baby" to break up a tiff among female fans fighting for the Steelers "Terrible Towel" he threw from the stage.

Video: Justin Bieber Break Up the "Terrible Towel" Fight

"Don't fight over it -- someone's going to get hurt," a responsible Bieber tells the pack of girls, before dictating which one would walk away with the towel. (A lawsuit would be a buzzkill at a Bieber concert, am I right?)

So you'd think Bieber would just restart "Baby" and the concert would go on as normal, but no. He bursts into the song again, only to have a giggle fit burst into him. He stops the song, then starts again -- for the third and final time.

Was Justin laughing at the absurdity of the situation just like the rest of us? Rabid girls squawking over a Pittsburgh Steelers "Terrible Towel"? We never thought we'd see the day either, Biebs.