We Can See Your Boob, Hayden Panettiere!

Hayden Panettiere obviously didn’t do the flash test before leaving the house.

The greasy looking 21 year old happily posed for pictures at the HBO Golden Globe party Sunday night not realizing her pasties were showing through her sheer blue dress.

Hey, at least she wore something under there.

[Image via Nikki Nelson/Judy Cortes/WENN.]