Heidi and Spencer's behavior cause their friends and family to make a difficult choice, while Kristin and Brody hook up but agree to stay single.

Heidi and Spencer head down the aisle and two unexpected guests manage to attend the ceremony.

Heidi and Stephanie sit Holly down for an intervention when she continues drinking. Plus, Kristin gets upset with Justin's head games and Brody and Jayde get into a fight that leads them to reconsider their relationship.

Lauren is put into an awkward situation after Stephanie messes up at work. Meanwhile, Justin calls out Audrina for hooking up with Brody.

Lauren returns to Laguna Beach for some advice. Meanwhile, Audrina and her new beau get serious with their relationship and Spencer proposes to Heidi.

Lauren lands in tears during her surprise birthday party when Heidi rocks the boat by showing up uninvited. Plus, Spencer takes a swing at Stephanie's ex-boyfriend, Cameron.

Brody and Kristin have a heart-to-heart, she wants to give their relationship another shot and Stephanie starts seeing someone new.

Kristin kicks her pursuit of Justin into high gear after Audrina blows her off, while Heidi and Spencer's opposing views on kids causes trouble.

Spenser is asked by Heidi to make amends with Lauren in hopes that she'll attend their wedding. Elsewhere, a recently fired Stephanie has a run-in with Kelly Cutrone, her former boss.

Audrina tries to make amends with Lauren after the fall-out. Then it's off to Nana's house where Spencer and Stephanie compete for their grandmother's affection.

The third season premieres with Lauren and Heidi still unable to get past their differences and having become mortal enemies. Meanwhile, Whitney has graduated from college and is now juggling a real job and Audrina has become Lauren's new roommate and best friend.

Heidi throws a party for her birthday where Audrina shows up to try and make amends. However, Heidi refuses to listen.

A nasty rumor threatens to end Lauren and Audrina's friendship and Heidi realizes Spencer's been withholding information from her.

Spencer has an important question to ask Heidi's father when he comes for a visit. Meanwhile, Lauren make the decision to fire Stephanie from People's Revolution.

After Heidi catches Spencer at a nightclub with Stacie the bartender, she demands they go to couple's therapy. Plus, Lauren puts her reputation on the line when she gets Stephanie an interview at People's Revolution.

Just when everyone believes that Justin Bobby is finally history, Audrina decides to rekindle the relationship, much to Lauren and Lo's surprise.

The gang heads to Costa Rica for a group surf trip, and Brody gets jealous when Kristin hooks up with a local bartender. Meanwhile, Audrina fights her attraction to Justin, and Stephanie finds herself at odds with the jungle environment

When Justin Bobby shows up onstage at a show Audrina, Steph and Lo are at, all the girls are surprised.

Whitney flies to New York City to apply for a new job at Teen Vogue. Meanwhile, in Los Angeles, Heidi gets a call from Spencer who has a huge surprise for her.

Kristin makes a big first impression in The Hills when she gets in a fight with two different women over one guy, works her way to queen bee status and lands a hot date with a motorcycle all in one episode.

Lauren and Jason make plans to spend the summer together, but their plans take a turn when Lauren is offered a summer job in Paris, France.

The gang make their return to Los Angeles. Meanwhile, Brody and Audrina deal the repercussions from their hookup in Hawaii.

Audrina invites Lauren out to dinner to get to know Justin better. Lauren is not impressed by him. Audrina talks to Justin and decides to give their relationship time. Spencer suprises Heidi by buying two arcade games for the apartment. Later, she suprises him by painting over the mural in the living room.

While on a lunch date, Kristin and Brody recall the crazy times they used to have together. After Brody toasts to having a nice lunch without fighting, Kristin mentions that Jayde wants to talk with her. Brody tells Kristin she's out of her mind ...

Spencer and Heidi's wedding date gets closer, but will he tell his family before he steps into church? The Teen Vogue event gives Whitney and Lauren a lot of work, while Jason tires to start over with a new girl and a new place.

Spencer and Heidi go away for the weekend to meet Heidi's parents, causing Spencer to flake on his and Brody's barbeque. Lauren, Audrina, Lo, and Justin Bobby attend. Justin Bobby flirts with other girls and leaves Audrina at the party, and Lauren finally realizes that she and Heidi will never be friends again.

Lauren tries to make peace with Heidi, but is instead stood up when Heidi decides to meet up with Spencer instead. Meanwhile, Whitney finds herself annoyed at the fact that she is not respected as a Teen Vogue intern.

Audrina wants to make things work with Corey, but finds herself torn when Justin drops by Epic. Meanwhile, Stephanie starts having doubts about her new boyfriend when he fails to defend her in front of Brody.

It's Audrina's birthday and the gang, including Justin, board a boat at Marina Del Ray to celebrate. Elsewhere, Kristin has another run in with Allie at a club where a fight erupts. Also Audrina breaks up with Ryan and Kristin warns McKaela to stay away from her.

Justin doesn't show up at Brody's party and Audrina has a new target.

Lauren faces the aftermath of her decision to opt out of her summer internship, Whitney returns from her internship, and Audrina and Heidi find themselves in a major feud over a new guy.

It's Lauren's birthday and for some guests an appearance at her party could mean a lot of trouble. Also from whom will Lauren receive a birthday kiss?

Lauren and Lo are looking into the real estate market as they plan to buy a house. Meanwhile, Audrina reconsiders her situation as a single woman.

Lauren is surprised by a job offer she receives. Meanwhile Heidi enjoys a night out with her friends, until she spots Spencer and things end up in a fight.

After their week in Paris, Lauren and Whitney are back home and have to adjust to the changes and the changes they plan to do.

A blowout trip to Las Vegas turns sour when Audrina snubs Lauren, Brody brings up Stephanie's past and the boys end up in jail.

When Lauren is away for a couple of days, Stephanie and Doug start dating secretly. How long will that stay a secret though?

Lauren is not at all thrilled in Heidi's decision to get back together with Spencer. The situation between best friends becomes even more heated and leaves their relationship hanging.

Doug and Stephanie have to explain themselves to Lauren. Meanwhile Heidi's mother pays a visit.

Loyalty lines are questioned when Stephanie Pratt makes nice with Lauren at FIDM. Plus, Whitney travels to NYC to jump-start her career with People's Republic.

When Jen wants to be friends again with Lauren, however the dark past starts to haunt everyone. And not everyone likes the past revealed.

Lauren ("LC") moves from Laguna Beach to Los Angeles where she plans to apply for an internship at Teen Vogue and attend fashion school. Alongside her is best friend Heidi who is pretty much just into the party scene. The real test of Lauren's new life is if she can juggle work, school, and partying. However, no matter where she goes, drama always seems to follow.

Lauren and Whitney go to Paris, but the trip is marred for Lauren when she finds out Brody is seeing someone new. Meanwhile, Spencer follows Heidi to Colorado to try to win her back.

Audrina suprises Lauren when she moves out, and Heidi disappoints Brent Bolthouse when she invites Spencer to a work event and gets caught having a little too much fun.

Audrina gets her heart broken when Justin ends things for good, it's a war of the exes over Brody, and Spencer considers drastic measures to stop Heidi's baby obsession.

Heidi tries to reach out to Lauren. Meanwhile Audrina has a date, but what will Justin say to that?

Whitney finds romance when she and Lauren head to New York City for fashion week. Back in L.A., Spencer makes things worse for Heidi by approaching Brent to ask for her job back.

Lauren and Audrina find out that Spencer has a sister. She also pays Spencer and Heidi a visit. When Lauren and Audrina hang out with Brody, they not only run into Spencer's sister, but also run into Justin - with another girl.

Brody celebrates his birthday in Las Vegas and of course Lauren and her friends are invited too. Meanwhile Heidi has to face more problems at work than she likes.

The girls go out to find a new home. When they find one, the guest list for the housewarming party is subject to more than just one fight.

Stephanie tells Spencer that Heidi might bail out of the wedding, so Spencer and Heidi fight once again. Lauren and Audrina both have a date.

Whitney and Lauren are sent to New York to present their ideas about the big fashion show. Meanwhile Franky tries to fix Brody's and Spencer's friendship.

Justin finds himself in hot water after Kristin and Audrina meet. Heidi wants to have a baby, but Spencer has another plan.

Holly reaches out to Lauren, forcing Lauren and Heidi to reconsider their friendship. Meanwhile, Audrina and Justin's relationship is tested.

Lauren tries to uphold her friendship to Audrina, but is it already too late? Meanwhile Spencer tries to win Heidi back and risks her career to do so.

Whitney's love life starts to heat up while Lauren's starts to cool down. Meanwhile Heidi and Spencer fight.

Stephanie gets blamed for spreading the rumors about Kristin's drug abuse problems, and Spencer lashes out when his sister approaches him at a party....

Heidi tries to fit into her new job. Meanwhile Lauren has to decide if she will give Jason another chance.

Whitney and Lauren are given the task of photographing male models for Teen Vogue, causing Jason to feel jealous. Meanwhile, Heidi and Jordan get into yet another argument.

Heidi heads home to show her family her post-surgery look, and Kristin's all-night partying begins to worry Audrina, Lo and Stephanie.

Heidi and Spencer constantly fight about how they should get married. Will they find a solution? Meanwhile Whitney has found a guy that asks her out on a date.

Heidi gets her big chance to work in the nightclub scene, but it happens to fall on her anniversary. While at a Teen Vogue fashion show, Whitney is asked to walk the runway since a model is a no show. Meanwhile, Jason does his best to get Lauren to pay more attention to him, and less to work and school.