Kristin Cavallari1

Making the weekend trip out to Sin City, Kristin Cavallari hit up DJ AM’s nightclub, DUSK, inside Caesars Atlantic City Casino on Saturday night (July 18).

Joined by a guest list including Nick Lachey and reality blogger Arthur Kade, the "Hills" hottie partied it up while enjoying a surprise live performance by Robin Thicke.

Meanwhile, Miss Cavallari recently chatted with MTV news about her work on "The Hills," insisting the show is anything but fake.

She tells, "Everyone’s going to have an opinion. And everyone’s going to think what they want. You can’t really change that, so …"

Continuing on about the difference between working on movies and reality television, Kristin explains, "It’s definitely different. I love being on set and being in a movie. I think it’s so much fun. I really, really love it. And the ‘Hills’ or ‘Laguna Beach’ is more like hanging out with people you know, rather than acting and memorizing lines and stuff."