Lauren learns that Brody has found someone new, nearly ruining her trip to Paris; Spencer tries to win back Heidi.

Lauren learns that Brody has found someone new, nearly ruining her trip to Paris; Spencer tries to win back Heidi.

A wild Las Vegas weekend makes Kristin question her feelings for Justin; Spencer devises a plan.

Kristin clashes with Jayde over Brody; Heidi hatches a plan to get pregnant; Audrina deals with Justin's feelings for Kristin.

Kristin and Brody consider dating; Audrina and Justin meet to discuss their future; Spencer takes drastic measures.

Justin is in hot water when Kristin and Audrina meet; Heidi wants a baby, but Spencer has other ideas.

Justin plays hard to get with Kristin; Heidi and Stephanie hold an intervention for Holly; Brody and Jayde get into a fight.

Kristin believes she has tamed Justin; Holly loses control at an event.

Kristin gets her first taste of being in a relationship; Heidi and Spencer disagree about when to start a family.