According to the the Digital Spy, Hayden Panettiere did a surprise strip tease for Milo Ventimiglia on the set of Heroes. The surprise strip tease was to sing happy birthday to Milo, who turned 31 on July 8th.
Hayden wore a special velcro-lined version of her character’s cheerleader outfit. When the time came, during lunch break, Hayden ripped it off to reveal red lingerie underneath. Hayden then sang happy birthday to Milo in front of the cast & crew – Milo reportedly went "bright red."
Here are some more photos of Milo Ventimiglia at Comic-Con 2008 this week: