She turned that into a stint on "Dancing With the Stars" and a starring role in a series of exercise DVDs. But the 28-year-old celebutante's most recognizable role is on the red carpet of many a C-list event, smiling for photographers and striking her signature three-quarter-turn pose, the better to get a get a good shot of the rear end that made her famous.
They may not be related by blood, but Kardashian's step brother, Brody Jenner, certainly takes after her in the fame-mongering department. The 25-year-old son of Olympic decathlon champion Bruce Jenner tried and failed launching his own reality TV series, "The Princes of Mailbu," before dating his way into the bold-faced name club, most famously hooking up with "Hills" star Lauren Conrad. Jenner's "Hills'" stint won him his own MTV show, "Bromance," in which seemingly self-esteem deprived dudes vied to win the title of Brody's BFF. These days, Jenner can be found out and about on the party circuit with his latest love interest, Jayde Nicole, Playboy's 2008 Playmate of the Year.
Were it not for Britney Spears' bad judgment, the world might never know Kevin Federline. The 31-year-old dancer went from the back rows of Spears' dance squad to the cover of the tabloids when she married him in 2004. They quickly had two kids, Sean Preston and Jayden James, before launching one of Hollywood's most highly publicized divorces in 2006.
Federline's fame has since dwindled down to starring in a commercial for Nationwide's "Life Comes at You Fast" ad campaign and appearing on professional wrestling shows. Still, he reportedly banked $175,000 from the Las Vegas nightclub Pure for throwing his 30th birthday bash there. But thanks to Spears' antics, Federline, who retains custody of their children, carries around a title more redeeming than professional partier. Details magazine named him Father of the Year in 2007.