Audrina Tight Lipped Over New PiXXX

3/31/2008 6:00 PM PDT

Audrina Tight Lipped Over New PiXXX

Audrina had no problem taking it off ... as long as she doesn't have to talk about it!


Also in New York: A surprisingly happy Robin Williams, Kate Hudson was on the run, Avril tried to be punk, and Paul Dano -- who got asked one of the lamest questions ever.

In LA: Miley Cyrus did a mall tour, Ty Pennington tried to duck the cameras, Colin Farrell was surrounded by chicks, Christina Aguilera snuggled with her man, Kate Moss dodged paps, and Shannen Doherty proved she can get along with some co-stars -- eating out with "Charmed" bud Holly Marie Combs.