costume Ashley Tisdale heels

Paris Hilton and beau River Viiperi weren't the only ones dressed as Batman and Robin!

Ashley Tisdale and her pal Kim dressed as the iconic duo last night, and the ladies looked like they were having a blast when we snapped them leaving a Halloween party in the valley.

The former High School Musical starlet tweeted, "Batman and Robin #nanana anananananananaBATMAN." Ahh, we love it when stars in sexy costumes post meaningful messages late at night! But when was the last time you saw Batman dressed like this?