1. This week The Hills star Kristin Cavallari explains how she went from Beach Bum to Beverly Hills fashionista, reveals which looks she'd never be caught dead in today and shares what she thinks of Heidi Montag trying to bite her style when we ask, "What Were U Thinking?"

More On Kristin's Style

  1. Kristin looks back at her very first red carpet outfit!

  2. Kristin tells us why NOT to wear heels when traveling.

  1. We take to the streets to find out what YOU think about one of Kristin's sexiest looks.

  2. Beach bum to Beverly Hills, see how Kristin's style has evolved in our photo recap!

  1. Which of Kristin's looks best fits your personality? Take the quiz and find out!

  2. Kristin gossips about Cali catfights at 'It's On with Alexa Chung.'

  1. Internet superstar Debra (aka John Roberts) tells us why she loves Kristin's style.

  2. Look out, Kristin...There's a new hot blonde in town!

About Kristin Cavallari

What would happen if we took your favorite fashionable celebs, showed them five outfits they've worn out in public over the years, and asked them, "What Were U Thinking?" You're about to find out!

This week, we're asking Kristin Cavallari. When Kristin moved to Laguna Beach, she had no idea how much her life was going to change. She was just a simple beach girl, who loved jean shorts, flip flops, bikinis, and tank tops. But once Laguna Beach: The Real Orange County premiered, Kristin became an instant star. Teens across America became obsessed with the rivalry between Kristin and Lauren Conrad, who were both interested in the same guy, Stephen Colletti. They also became obsessed with Kristin’s sense of style. From the very first episode when Kristin showed up at LC’s "black attire only" party wearing a white dress, viewers took sides: Team Kristin or Team Lauren?

After Laguna Beach had ended it’s hit run, Kristin moved on to bigger Hollywood success, and was a constant fixture on the red carpets and at award shows all over town. Her sense of style naturally evolved to include designer dresses, Kristin learned all the rules of fashion and figured out what works for her body type and the way she wants to present herself.

This year, when Lauren Conrad decided to leave The Hills, Kristin was immediately signed up as the new star. When the new season of The Hills premieres, America will definitely be watching!

Past Guests

  1. We asked Jessica Szohr 'What Were U Thinking?' on October 21. Watch the episode now!

  2. We asked Ashley Greene 'What Were U Thinking?' on October 12. Watch the episode now!

  3. We asked Nelly Furtado 'What Were U Thinking?' on September 28. Watch the episode now!

  4. We asked Kim Kardashian 'What Were U Thinking?' on September 21. Watch the episode now!

  5. We asked Keri Hilson 'What Were U Thinking?' on August 24. Watch the episode now!

  6. We asked Adrienne Bailon 'What Were U Thinking?' on August 10. Watch the episode now!

  7. We asked Kelly Osbourne 'What Were U Thinking?' on July 27. Watch the episode now!