Vanessa Hudgens, the ex-Disney star who plays a sexy scamp in the upcoming “Spring Breakers,” says she and castmates including Selena Gomez got hosed down while filming at 4 a.m. in a parking lot. “We were honking our horns and being loud and obnoxious . . . and this woman puts her lights on and starts screaming profanities and threatening to call the cops,” she told us at a party for John Varvatos at Houston Hall. “She grabbed a water hose and started spraying over the fence at us.”