PAMELA Anderson tore up Miami during her weekend trip to Art Basel to support her good pal David LaChapelle. Anderson first went to the Miami Convention Center on Saturday to pose for photos with LaChapelle in front of his “Jesus Is My Homeboy” exhibit, wearing a gray T-shirt, yellow underwear and pink heels, and with mysterious bruise marks on her back. She next went to Liv to celebrate her nude Ocean Drive cover, escorted by LaChapelle and PETA head Dan Mathews. Anderson, who seemed unsteady on the red carpet, then drank absinthe before making out with Stephen Dorff, a witness said. Anderson ditched Dorff – after briefly passing out on LaChapelle’s shoulder – to hit up four other parties and was last seen Sunday morning around 11 a.m. in the lobby of the Fontainebleau coming in from her wild night with a young hot man “who was not Dorff.” A rep for Anderson didn’t return calls.