Social was the place to be last night, as the stars joined Jessica Simpson and David Spade for a bday party at the hip hollywood club. Kirsten Dunst tried to hide from the cameras, Ashlee Simpson showed up just a few minutes after her sister, Rachel Bilson, who was there with girlfriends, looked absolutely beautiful and Mario Lopez coyly dodged our quetions about Karina (although from the way he was smiling when we even mentioned her name, seems like we'll definitely be seeing more of those two together in the new year). Tatyana Ali and Kevin Farley (Chris' brother) also make an appearance.