Lauren celebrates a birthday, Stephanie's loyalty shifts further, Spencer retrieves the rest of his toys, and Heidi's wardrobe goes Hollywood.

Lauren befriends a classmate, Stephanie acts like a brown noser, Whitney revolutionizes pants, and Frank recalls his Dark Summer.

Whitney moves on from Teen Vogue, Spencer moves in with Stephanie, Lauren gives Brody the cold shoulder, and Kelly Cutrone makes her Hills debut.

The girls travel to Paris, Heidi retreats to Colorado, Spencer makes an awkward romantic gesture, and Lauren shows everyone how to ruin a ballgown.

Teen Vogue gives Whitney another opportunity, Lauren pouts and then gets what she wants anyway, and Heidi takes time away from Spencer.

Brody can't quit the ladies, Lauren can't quit trying to make Brody happen, Heidi doubts Spencer's desire for a wedding, and Audrina dates a new guy.

The gang squares off against She-Pratt, Heidi inherits a new best friend, Justin Bobby falls out of Audrina's good graces, and Frank and Meredith are thrilled to return.

Whitney goes on a date with the cute trainer, Heidi and Spencer have different visions for their ideal wedding, and Frank gets an exciting new addition to his wardrobe.

Audrina gets promoted to her own cubicle at Epic, Justin Bobby continues to astound, Heidi tries to make amends, and Lauren wants to forgive and forget.

Lauren and Whitney work the Young Hollywood party, Heidi celebrates her 21st birthday with the lamest party ever, and Frank recounts his night of glory at The Viper Room.