The Hills

Lauren doesn't go to Heidi and Spencer's housewarming party after hearing Heidi's been spreading rumors about her. But when Lauren and Heidi run into each other, they have their biggest fight yet, and the old friends become new enemies.

Lauren and Heidi grow even farther apart when Spencer asks Heidi to marry him. Audrina gets serious with a boyfriend from her past, and Lauren returns to Laguna Beach for some advice.

Lauren tries to help Audrina decide if Justin is boyfriend material, but Audrina has already made up her mind. Heidi learns that being engaged isn't all fun and games.

Heidi takes her fiancé Spencer to meet her family in Colorado, but her parents worry that she's sacrificing her friendships for her relationship. Audrina is crushed when Justin ditches her at Brody's barbecue, and Lauren finally admits how much she misses Heidi.

Heidi's social circle shrinks as Spencer "breaks up" with Brody for hanging out with Lauren. Audrina wants to make her relationship with Justin official, but he refuses to commit.

Lauren gets a blast from the past when her ex-boyfriend Jason calls. Heidi competes with her co-worker Elodie for a promotion at work.

Lauren's feelings for Jason are rekindled, but when they run into Heidi and Spencer, tempers flare. Heidi's promotion at Bolthouse cost her Elodie's friendship.

Lauren is shocked to learn that Jason has a girlfriend, but Jason has a bigger surprise up his sleeve. Heidi finds out Spencer hasn't told his parents about their wedding plans, and Whitney gets in trouble for partying with a rock band before a Teen Vogue photo shoot.

The gang celebrates Brody's birthday in Vegas. Audrina's boyfriend Justin causes a rift in her friendship with Lauren. Lauren and Brody's attraction toward each other grows and Heidi and Spencer's anniversary is cut short when Elodie does the unexpected.

Jen Bunney tells Lauren that Brody started the rumors about her, but Brody puts the blame on Spencer, leaving Heidi caught in the middle. Lauren apologizes to Audrina for interfering in her and Justin's relationship.

Lauren starts a new romance with a male model, but realizes she still has feelings for Brody. Spencer fears that he's losing Heidi to her new job.

Lauren and Whitney are sent to New York City where Whitney attempts her first presentation to Teen Vogue's top editors and Lauren meets a fashion icon. Spencer tries to pull Brody back into his life, but Brody isn't ready to forgive and forget.

Lauren and Whitney struggle to put on a Marc Jacobs fashion show at Teen Vogue's Young Hollywood Party. When a new guy shows interest in Audrina, Justin begins to take their relationship more seriously.

Heidi and Lauren have another fight in public causing Heidi to return to Lauren and apologize for everything that's happened. Audrina's relationship with Justin is stuck in a rut, but her career at Epic Records begins to take off.

Lauren plays matchmaker as Whitney goes on her first date with their personal trainer. Spencer resists Heidi's plans for a fairytale wedding, resulting in a fight that threatens their whole engagement.

Audrina catches Justin kissing another girl, leading to a final confrontation about their relationship. Heidi is shocked when Spencer's sister Stephanie picks a fight with Lauren and Brody at a night club.

Lauren thinks Brody might be too much of a playboy for her ever to get serious about him. Spencer's sister tells him Heidi is secretly having doubts about their wedding, and Audrina goes out on her first date since breaking up with Justin.

Lauren struggles to figure out her relationship with Brody, but an offer to work in Paris makes things more complicated. Heidi questions her future with Spencer and decides to leave Los Angeles.

Lauren Conrad takes a trip down memory lane to revisit some of the most significant choices she's made - in love and life during "The Hills: Lauren Looks Back."

Lauren finally gets to go to Paris, but her dream trip is almost ruined when she finds out Brody has found someone new. Spencer chases Heidi to Colorado to try to win her back, but his plan backfires.

Whitney must choose between the safety of Teen Vogue and the risk of a new career. Lauren and Brody clash over his new girlfriend, and Heidi adjusts to life without Spencer.

Lauren makes an unlikely friend when Spencer's sister Stephanie joins her fashion class. Whitney thinks her new job is a dream come true, but a hectic trip to New York reminds her to be careful what you wish for.

When Lauren invites Stephanie to her birthday party, Heidi and Spencer question Stephanie's loyalty. Spencer launches a plan to win back Heidi.

Heidi tries to win back Audrina's friendship, but Lauren grows suspicious of Heidi's motives. Whitney adjusts to her new job, but quickly discovers that she misses working with Lauren.

Heidi loves her single life, until seeing Spencer with other girls makes her jealous. Whitney enlists Lauren's help during LA Fashion Week, opening new doors for Lauren and her career.

With Spencer out of the picture, Heidi makes a last attempt to regain Lauren's friendship. When Audrina starts spending more time with Heidi and Justin, Lauren questions whether they should continue living together.

An old romance is rekindled when Stephen Colletti reenters Lauren's life. Heidi tries to prevent Stephanie from attending Lauren's housewarming party.

Lauren is caught between friends, as tension between Lo and Audrina builds. Deciding things are over with Spencer, Heidi accepts a job opportunity that will take her to Las Vegas. When Stephanie kicks Spencer out of her house, he returns to Heidi but realizes it may be too late.

In the season finale, Audrina feels shut out by Lauren's close friendship with Lo, and wants to move out. Lauren makes a heartfelt attempt to patch things up with Audrina, but it may be too late. Meanwhile, Spencer fears he's going to lose Heidi forever when he learns she's taking a job in Las Vegas.