Kristin Cavallari: We've Got Our Eyes On 'The Hills' Vixen In This Week's Star Gazing

When Kristin Cavallari sauntered down the aisle of Heidi and Spencer's wedding, taking a seat next to resident bad boy Justin Bobby, we had a feeling things on "The Hills" would never be quite the same. But it may have taken a bit longer for this realization to hit fellow cast members, including Spencer's sister Stephanie, who's overheard in the "Hills" trailer wondering, "How can one person turn all of our lives upside down?" Did you not watch "Laguna Beach," Stephanie?

With Kristin joining the fifth season of "The Hills," which premieres tonight at 10 p.m., we've made her the focus of this week's Star Gazing. Click on the photo below to see more pictures of the blond bombshell and read on to learn how Kristin went from fighting with LC over a boy (Stephen Coletti, obvi) on "Laguna" to filling her pretty pumps on "The Hills."

You may be surprised to learn that unlike many of her "Laguna" castmates, Kristin does not originally hale from the posh beach town. She was born in Denver, CO, moving with her mother to a Chicago suburb after her parents divorced. A few years later she moved back in with her father who had moved to Laguna Beach, initially attending a private Catholic school before transferring to Laguna Beach High for her sophomore year.

During her junior year, MTV tapped her and several classmates to appear on their real-life version of the hit T.V. series "The O.C." And as we all know, love triangles and lots of drama followed.

Upon graduating from "Laguna," Kristin began fielding hosting and acting offers, signing on to the short-lived makeover show "Get This Party Started." Since then, you've likely seen her in a handful of music videos including Teddy Geiger's "For You I Will (Confidence)" and Gavin DeGraw's "In Love With a Girl." She's also landed several acting roles on T.V. ("Veronica Mars" "CSI: NY") and on film ("Van Wilder: Freshman Year").

Are you excited to see what kind of trouble Kristin causes on the new season of "The Hills"?