Hayden Panettiere went out to whoop it up at Guy's Restaurant in Hollywood recently with Kimberly Stewart, Kourtney Kardashian, and Kim Kardashian. One of the women forgot to put on clothes. Can you guess with one it is?

Hint: It's the the girl pictured above. But instead of going stark naked, the Hero's starlet kept a towel on.

Dunno, what do you think? comment below.

Source: http://www.zimbio.com/Daily+Paparazzi/articles/101/Daily+Paparazzi+Hayden+Panettiere+Running