The real housewives of Orange County

All change! Vicki finalizes her divorce, puts her house up for sale and hangs out with Brooks. Gretchen and Tamra try to resolve their differences.

Watch out, Heather's in town! After a dramatic dinner at Vicki's, Peggy abandons the friendship group and Gretchen bares all for a charity photo shoot.

New housewife Heather throws a "painting party" to get to know the ladies. Alexis and Vicki make snide remarks to Gretchen and Tamra about their budding friendship, and Alexis envies Heather's perfect life. Gretchen and Slade dig up questionable information about Vicki's new boyfriend that is sure to send shockwaves through the OC.

Heather and Alexis try to bury the hatchet while Slade's stand-up comedy embarrasses Gretchen given his source material is based on her friends!

Heather gossips to Tamra about Slade, stirring tensions with the other women which boil over at Tamra's 80s themed Bunco party (obvs).

Slade and the other guys crash the Bunco party causing uproar, particularly with Vicki. Alexis also comes under fire for her upcoming nose job.

We're off to the hospital as Alexis undergoes nose surgery and Vicki receives Briana's surgery results. Meanwhile, Gretchen prepares for her Vegas debut.

Emotions run high as Vicki finds out more about Briana's health and Tamra drags her heals about finalizing the divorce from Simon.

Tamra and Vicki's love lives take centre stage, while Heather throws a bash that ends in a row between Vicki and Gretchen's friend Sarah.

Alexis and some of the girls escape for a weekend of glamping - will they survive in the wild, let alone with each other?

Heather travels to Hollywood for auditions but questions are asked about her duties as a parent. Gretchen preps for her big show with the Pussycat Dolls.

Gretchen gets through her big performance with the Pussycat Dolls. Back in the OC, a get together leads to Terry insulting Alexis.

A wine party leads to a big announcement from Vicki and a difficult interlude between Briana and Vicki's new love, Brooks.

Who says romance is dead? Heather joins Slade to help choose an engagement ring, while Tamra has Simon's name removed from her wedding finger.

Vicki's rift with Briana threatens to push her over the edge, while Gretchen and Slade attend marriage counseling.

Get set for a tropical adventure! In Costa Rica, it's not just the jungle that's scary as Vicki seems on edge and Alexis gets a reality check.

On another high octane day in Costa Rica, Alexis flees the criticism of the others for the safety of the OC, while Vicki breaks down.

Alexis faces her biggest test yet: reporting on-location for her final Fox 5 news segment, while Vicki pushes Brooks to fix his teeth. Meanwhile, Gretchen accidentally uncovers Slade's plan to propose, leading to a confrontation that puts them over the edge.

Heather hosts a fabulous party to celebrate her new surname, but when Alexis shows up with her friend Sarah the temperature rises to boiling point.

The party and season end with a bang. Heather is forced to make a dramatic decision, while Alexis' husband tears Terry to shreds.

After the most dramatic season to date, the OC ladies come together again for laughter, fighting and tears. Alexis is in the hot seat when she demands an apology from the ladies for calling her phony. An all-out war results when Tamra, Heather and Gretchen point out examples of Alexis' insincerity and Vicki comes to her defense. Meanwhile, Gretchen accuses Vicki of being a hypocrite regarding her relationship with Brooks, leaving Vicki feeling backed into a corner with almost no support.

In part two of "The Real Housewives of Orange County" reunion, Vicki's relationship with Brooks takes center stage when he stops by to give the ladies a piece of his mind. When Briana joins the group, Vicki's fidelity and Brooks' motives are called into question as accusations against the couple arise. By the end of the reunion, friendships are frayed, new alliances are formed, and the women's relationships with one another may never be the same again.

Andy Cohen gathers the top 20 moments from the Real Housewives' reunions. From walk outs, put downs and blow ups, these unforgettable moments make the list.