Our TMZ spy at the shoot in Venice, Calif., tells us that the cranky ace was rude to the crew, wouldn't eat the pricey catered food and insisted on In-N-Out instead. Can't blame her there. But when paparazzi appeared, the court queen quickly flipped her bitch switch to off. Still grumpy over her loss to Serena, perhaps?
Calls to her reps were not immediately returned