The season finale saw Port relocate to New York City to accept employment with Diane von Fürstenberg, while Montag and Pratt elope.

Upon the conclusion of the season, Port was commissioned her own spin-off series The City, which originally chronicled the lives of her and friends Olivia Palermo, Jay Lyon, Erin Lucas, and Adam Senn.

The fourth season continues as tension builds between housemates Lauren Conrad, Audrina Patridge, and Lo Bosworth.

As part of her duties with Kelly Cutrone's PR firm People's Revolution, Whitney Port finds herself often travelling to New York City and living a bi-coastal lifestyle.

Meanwhile, to the dismay of her boyfriend Spencer Pratt, Heidi Montag allows her sister Holly to temporarily live with them after moving from their hometown of Crested Butte, Colorado.

Upon returning to Los Angeles, Conrad and Montag appear to come to common terms and become friends again out of spite of suspicions over Spencer.

Lauren Conrad serves as the series' narrator and focal point, and continues to attend the Fashion Institute of Design & Merchandising (FIDM).

Heidi Montag remains estranged with her former friends Conrad and Patridge, and is employed by event planning company Bolthouse Productions.

Lauren ends her relationship with Doug after failing to rekindle the feelings they shared during their adolescence, and suggests that a friendship would be more successful.

During a trip to Las Vegas, Lauren struggles to salvage her friendship with Audrina, while Brody tells Stephanie that she is dishonest and unwelcome in their social group.

[13] When traveling to New York City with Lauren for a business trip, Whitney quickly bonds with a singer named Jay.

Whitney accepts a job offer from Diane von Fürstenberg, and makes her final appearance on the series after sharing a tearful goodbye with Lauren before moving to New York City.