'Harry Potter' and 'Perks of Being a Wallflower' starlet Emma Watson flashed a touch more than she bargained for while leaving the Automat bar in London at 4 a.m. one evening.

In her defense, she was probably really tired as she'd just turned 18 and gained access to her $10 million dollar fortune (which had been kept under lock and key until she became of age).

What we're saying is she was probably partying really hard that night. But she probably didn't want to celebrate by showing off her striped panties.

Oops.