Getting all prettied up for a night on the town, Kristin Cavallari stepped out for the 2009 Jingle Ball at the Nokia Theatre in Los Angeles on Saturday night.

The “Hills” hottie smiled as she posed for pictures on the red carpet, proceeding to head inside to check out the fun-filled charitable festivities.

In related news, Miss Cavallari has been her usual busy self on her Twitter account, most recently posting messages relating to her sexy appearance.

She writes, “My friend says to me that I look like Alicja Bachleda – Curus. Colin Farrell’s girlfriend. I dont know whether that is a compliment or not.”

The 22-year-old added, “I want to grow old without face lifts. I want to have the courage to be loyal to the face I have made.”

Always animated, Kristin Cavallari showed off a range of interesting faces as she was seen filming a comedy skit at a restaurant in West Hollywood on Friday afternoon.

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Making her way to Sin City for the weekend, Kristin Cavallari played host at LAX nightclub inside the Luxor Resort Hotel Casino in Las Vegas on Saturday (October 10).

Wearing a sexy little black dress, the MTV reality starlet blew kisses to photogs as she strutted along the red carpet before earning her appearance fee by getting the party underway.

Meanwhile, Miss Cavallari recently receved praised from Whitney Port and Brody Jenner for the drama she’s been bringing to “The Hills”.

“It’s been fun,” Jenner told MTV News. “Me and Kristin have always gotten along. We used to date way in the past, but we’ve always kept a good friendship and it’s fun. Obviously, I love Lauren. But Kristin adds something different and new. She doesn’t take anything from anybody, and so it puts a different spin on ‘The Hills.’ It’s a good little twist every week.”

Meanwhile, Miss Port tells, “I think it’s great that she’s on it. I think everyone’s going to miss Lauren a lot, because she’s such a staple and the main girl and just who everybody saw themselves as or through. I think Kristin will probably bring a level of drama that will be enticing and intriguing and fun for people to watch. It will just be different.”

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."

Always a fan of high-profile parties (especially her own), Kristin Cavallari was spotted on her way out of Hyde Lounge last night (January 5).

The “Laguna Beach” babe was celebrating her 22nd birthday party with an ‘80s-themed party, and she was certainly dressed for the occasion

Miss Cavallari donned a grey stretch bodysuit along with a pair of maroon leggings complete with fluorescent orange legwarmers as she made her way to a waiting car.

And if she’s looking a bit more tan than usual, it’s probably because she spent her New Year’s holiday basking in the beautiful sunshine of Miami Beach.