Mel Gibson grabbed Maria Menounos Bikini's on her birthday party

Mel Gibson wasn't even supposed to be at Maria Menounos' private birthday bash, but that didn't stop the Mad Max star from grabbing the birthday girl and swinging her around for a dance.

Menounos was celebrating her 34th birthday with a Hawaiian themed party at her Encino home Saturday when the Lethal Weapon star arrived.

According to TMZ, Gibson - invited by someone who works with the TV hostess - shuffled into theparty wearing a white, un-tucked shirt, jeans and sports sandals. 

Bogey man: Mel Gibson grabbed Maria Menounos for a dance at her 34th birthday party on Saturday in Encino, California (Read more and See more Pictures)