When actress Kellie Williams trades lives with singer CeCe Peniston for a week, the two gain perspective on each other's lives.

Jenna von Oy leaves her modest home and quiet life in Nashville and swaps places with Jill Zarin, who has a lavish summer home—complete with a staff—in the Hamptons, where she frequently hosts big parties.

In the Season 2 finale, the wife of Gerardo Mejia leaves behind her many chores at the home where her husband hosts a weekly Bible study, and swaps places with Sisqo's girlfriend, who color coordinates her outfits with Sisqo and abides by a strict diet.

Actress and singer Nia Peeples leaves her surfer husband and mobile California beach home and swaps places with 1980s pop star Tiffany, who lives a busy life in Nashville, where she and her husband each run separate businesses.

David Justice's wife leaves behind her housekeeper, groundskeeper and sprawling home in San Diego and swaps places with Dweezil Zappa's wife, who lives an eco-friendly, cell-phone-free lifestyle in Los Angeles.

The wives of soap-opera stars Tyler Christopher and Ronn Moss swap places.

Angie Everhart swaps places with Gina Neely, and food becomes a big issue in both households because Angie's boyfriend runs a prepackaged food-delivery service, while Gina and her husband are cooking-show hosts who prepare elaborate meals.

Bristol Palin and Melissa Rivers swap places. Bristol tries to inject some fun into the Rivers' strict regime, while Melissa strives to add structure to the unruly Palin household.

Larry Birkhead's sister leaves her unstructured, fast-food-loving household in Kentucky and swaps places with Helio Castroneves' girlfriend, who runs an orderly, health-conscious home in Florida.

The wives of Sean Lowe and Jason Mesnick, former cast members on "The Bachelor," swap places. Sean's wife leaves behind her life as a full-time homemaker in Dallas and heads to Seattle, where she takes on Jason's wife's job as a morning radio-show host.

Eric Roberts' wife leaves her pet-filled home in Los Angeles and switches places with Robin Leach's dear friend, who's used to a lavish lifestyle in Las Vegas.

In the first-season finale, actor Antonio Sabato Jr.'s fiancée leaves her cleaning-obsessed lifestyle and swaps places with the wife of wrestler Mick Foley, whose household has a somewhat unstructured regime.

In the third-season opener, Jermaine Jackson's wife leaves her opulent Hollywood Hills home to swap places with Daniel Baldwin's ex-girlfriend, who lives in a simple house in Calabasas, Cal.

Coolio's independent girlfriend swaps places with Mark McGrath's wife, who receives child-care help from her parents and a nanny.

Former VJ "Downtown" Julie Brown leaves her relaxing, slow-paced lifestyle and swaps places with retired WNBA player Lisa Leslie, who has her family adhere to strict schedules for activities, dinner and bedtime.

Actor Tommy Davidson's fiancee Amanda trades lives with actor Corey Feldman's fruitarian girlfriend, Courtney.

Gilbert Gottfried's wife, who's grown accustomed to her husband's frugal ways in their tiny New York City apartment, switches places with Alan Thicke's spouse, who often throws extravagant dinner parties at their spacious California ranch.

Amanda Beard leaves her secluded cottage home and outdoor lifestyle near Seattle and swaps places with Heidi Pratt, who lives a more social life filled with shopping adventures and nightclub outings in Santa Barbara, Cal.

In the series premiere of this spin-off of "Wife Swap," the pious wife of pastor Ted Haggard goes to a home that rejects organized religion when she swaps with the spiritually open fiancée of Gary Busey.

Country gal and outdoors enthusiast Tina Yothers swaps with Niecy Nash, who lives a fast-paced, Hollywood lifestyle.

Lorenzo Lamas' wife leaves her two jobs and home in Beverly Hills and swaps places with Andy Dick's former love interest, who lives on the same property as Andy and his new girlfriend in Calabasas, Cal., and who chauffeurs Andy around to his appointments.

Laila Ali leaves her Los Angeles home, which runs on a strict schedule, and swaps places with and Angie Stone, whose family has a laid-back lifestyle in Atlanta.

The personal assistants of Joe Piscopo and Barry Williams swap places.

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In the second-season opener, mother of eight Kate Gosselin leaves her rigidly ruled home in Pennsylvania and swaps places with former Playboy Playmate Kendra Wilkinson, who lives a laid-back life in Los Angeles.