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 tells Tamra that she and Vicki were the butt of Slade's jokes in his insulting comedy routine, and Tamra is not amused. Vicki feels insulted but is distracted by Briana's upcoming thyroid surgery. Alexis is nervous about her upcoming nose surgery because she's convinced that her doctor must remove her nose entirely. At Tamra's '80s-themed Bunco party, a friend brings up Slade's jokes and a simmering controversy explodes. While Gretchen jumps to Slade's defense, Tamra tries to diffuse the situation by revealing a surprise - much to Vicki's horror.

The Bunco Party takes an uncomfortable turn when Slade and some of the OC men, invited by Tamra, join the party. Confronted immediately by Vicki about his comedy routine, Slade aggressively defends himself. Gretchen and Vicki get into a vicious screaming match, where Gretchen accuses Vicki of being a hypocrite. Alexis gets defensive when Tamra and Heather call her out on her upcoming nose job. Later, once the party drama has passed, Alexis goes in for her surgery, and Vicki's daughter Briana heads to the hospital to have her thyroid removed, fearing the worst - cancer.

A nervous Alexis undergoes sinus surgery, where her plastic surgeon additionally removes a bump from her nose. Meanwhile, Vicki is distraught as Briana's thyroid surgery went worse than expected. Tamra visits her doctor and decides to have her breast implants removed. Heather travels to LA in a helicopter to get advice on opening a restaurant. Gretchen watches a rehearsal of the Pussycat Dolls in preparation for her Las Vegas debut, but will she realize that she's in over her head?

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

Both Tamra and Vicki's romantic relationships are moving full speed ahead. While Eddie stands by Tamra's side through her breast implant removal surgery, Vicki shares very personal information with Brooks. Alexis continues her work at the local news station, but Jim wants her to return to being a full-time, stay-at-home mom. Later, Heather invites the housewives to a fun night of bowling and champagne, but chaos ensues when Gretchen's friend Sarah erratically confronts Vicki.

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.

Slade enlists Heather to go engagement ring shopping with him, but Gretchen and Heather's subsequent conversation throws Slade's plans for a loop. Alexis throws an over-the-top birthday party for her four-year-old twins, while Tamra goes under the knife to have her "Simon" tattoo removed from her 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.

All the women attend an extravagant party at Heather's house to celebrate her new last name. Vicki flaunts an expensive gift from Brooks, while tension still runs high with her and Briana. Alexis faces Gretchen and the other women for the first time since Costa Rica. Tamra is having a good time until Jeana shows up, re-opening old wounds. And then drama hits an all-time high when Alexis' friend, Sarah, commits the ultimate party foul, spinning everything and everyone out of control.

The drama continues at Heather's opulent party in this season's finale. Sarah's bizarre actions force Heather to take drastic action. Tamra and Gretchen commemorate their new friendship with a heartfelt gift. Alexis' husband, Jim, crashes the party and confronts Heather's husband, Terry, about calling Alexis phony. Meanwhile, Brooks instigates an explosive fight between Vicki and Tamra that leaves the future of their friendship in doubt.

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.