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.

Heidi finds out the results of her pregnancy test while Lauren and Whitney are asked to cover a major fashion show. Meanwhile, Audrina turns Spencer down when he asks her out on a date.

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

Heidi and Audrina go out to have dinner and they finally talk about their issues and Spencer.

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.

As if Lauren's falling off with Heidi wasn't enough, another one of her eldest friends, Jen, has eyes for Brody. Jen feels guilty for hooking up with Brody but Heidi encourages her to go for what she wants. Clearly, there is a lot more to mend in their relationships and Lauren assures Heidi that they'll never be the same as long as Spencer's still in her life.

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.

Lauren and Audrina make plans for New Year's Eve with a pizza and champagne pre-party. Spencer asks Heidi to move in with him and Lo moves into L.A.

Heidi decides to throw Lauren a surprise 21st birthday party and tells her about Spencer asking her to move in with him. Jen tries to apologize to Lauren but instead makes excuses, thus, Lauren doesn't accept her apology.

Whitney is getting ready to work with Teen Vogue after graduation, however, she has a lot of competition with other interns. She also gets to model at "Good Morning America." Meanwhile, Spencer still insists that Heidi move in with him.

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.