L.A. FanGirls can teach N.Z. FanGirls a thing or two

We can get down with Bieber Fever.

While Justin Bieber was out shopping on Mother's Day at the Grove with—shocker—his mom, the most hysterical part about the fan sighting was what you didn't see on camera.

Like how he really makes the girls within a 20 feet radius utterly squirm...It's so friggin' Hollywood.

One twentysomething babe who saw the teen sensation in Forever 21 fills us in on the