Lala Kent

Ariana reveals the reasons she wants Tom Sandoval to stick around after her birthday. Lisa advises the women to get back at their boyfriends for going to Las Vegas.

Lisa wants Stassi to keep her distance; Scheana and Ariana discover that their friendship may be damaged; James tries to get an invitation to Hawaii.

Sandoval and Schwartz learn that not all that happens in Vegas stays in Vegas when they surprise their girlfriends with shocking news; Kristen returns to SUR, but Ariana is not ready to forgive; Tom Sandoval and Ariana take the stage at the Improv.

James believes that Kristen is cheating on him, and seeks revenge by hooking up with Lala. Meanwhile, Lisa teaches her staff about fine wine.

The gang go to Hawaii to celebrate Jax's and Tom's birthdays; Lala tries to come clean about her flirtation.

Kristen finds herself in the hot seat, Mike Shay makes his first reunion appearance to talk about his struggles with addiction and Lala discusses the difficulties of being new. Jax, Schwartz and Sandoval delve into their wild trip to Las Vegas.