Lauren does not go to Heidi and Spencer's housewarming party after hearing rumors about a sex tape of her with Jason.
Spencer asks Heidi to marry him. Audrina gets serious with an old boyfriend, while Lauren returns to Laguna Beach for advice.
Lauren tries to help Audrina make a decision about Justin. Heidi and Spencer argue when she paints over his mural and he buys arcade games for their home.
Heidi asks Spencer to meet her parents in Colorado, but suddenly isn't sure if she's ready. Lauren attends a beach party at Brody's house in Malibu.
After Justin's disappearing act at Brody's BBQ, Lauren thought Audrina's days with the bad boy were over. But, as the two share a meal in their apartment, Audrina lets it slip that she's still interested in Justin.
Just when she thought her ex-boyfriend Jason was out of her life forever, Lauren receives a call from him. It seems that, after finishing his stint in rehab, Jason is interested in catching up with Lauren.
At the new hotspot Ketchup, Lauren and Jason laugh like it's old times again over dinner. But their fun abruptly ends as Heidi and Spencer stroll into the restaurant to celebrate Heidi's promotion and sit two tables away.
Lauren and Jason have been spending a lot of time together lately, leaving people wondering if they're becoming more than friends. But while having lunch together, Jason lets it slip that, not only does he have a girlfriend, but they're moving in together and have made plans to be married.
Lauren and the girls surprise Brody in Vegas for his birthday. Heidi runs into trouble with Spencer on their anniversary.
After lunch with Jen Bunney, Lauren confronts Brody about the sex tape rumors that Jen claims he spread.
Lauren has a date with "Mr. Perfect." Heidi's busy job schedule gets in the way of her time with Spencer.
After weeks of hard work, Whitney thinks she's finally found the perfect place for Teen Vogue to host the Young Hollywood party.
Heidi and Spencer are excited to celebrate her twenty-first birthday. Lauren and Whitney continue preparing the Young Hollywood party.
After the success of the Young Hollywood party, Lisa Love decides to send Lauren and Whitney to cover an event that celebrates the power of the vote. Heidi apologizes to Lauren, but Lauren tells her she wants to just forget they ever knew each other.
Heidi hands her engagement ring back to Spencer. Whitney goes on a date with her trainer.
Spencer's sister stirs up drama at the club. Audrina catches Justin Bobby red-handed with another woman.
Heidi suggests that she might want to postpone the wedding. Lauren lands in limbo with Brody when she realizes he has his eye on all the women in Hollywood.
Whitney receives some exciting news that she will be working in Paris for Teen Vogue, but Lauren won't be going. But a last minute change allows Lauren to attend. Heidi decides to take some time away from Spencer.
Lauren learns that Brody has found someone new, nearly ruining her trip to Paris. Spencer makes a surprise visit to Colorado in an attempt to mend his relationship with Heidi.
Back from Paris, Whitney chases her dream job and leaves Teen Vogue. Meanwhile, Spencer and Heidi make a difficult move in their relationship.
Loyalty lines are questioned when Stephanie Pratt, Spencer's sister, makes nice with Lauren at FIDM. Plus, Whitney travels to NYC to jump-start her career with People's Revolution.
All Lauren wants for her birthday is for everyone to just stop fighting! But, that wish isn't likely to come true after she invites Stephanie Pratt to her birthday party.
Lauren starts turning a little green with envy when Whitney fills her in on her new job at People's Revolution over lunch. Still just an intern at Teen Vogue, Lauren admits that Whitney's new gig sounds like her dream job.
As Audrina spends more time with Heidi and Justin Bobby, Lauren starts to question her living situation.
Heidi's night out with Audrina is ruined when Spencer shows up. Plus, Lauren helps Whitney during Fashion Week and impresses Kelly Cutrone.
When Stephen comes to visit, Lauren wonders if their friendship will turn into something more.
Tension builds between Lo and Audrina. Heidi accepts a job in Las Vegas. Stephanie kicks Spencer out.
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.