GIRLS BEHAVING BADLY

"Hairspray" star Nikki Blonsky and "America's Next Top Model" wannabeen Bianca Golden just had the worst vacation -- ever!  Cops tell us the two got into an "altercation" in the departure lounge at the Providenciales airport in the Turks and Caicos islands in the Caribbean -- and by altercation, we hear it was an all-out family brawl!