5. Kim Kardashian

Kim is the daughter of late Robert Kardashian, who was an American attorney. It might be easy to overlook a socialite and a TV star, but it's not so easy to overlook her latest investment.

Kardashian along with her three partners founded ShoeDazzle, an online shoe and accessories website. The site reportedly has 3 million customers, who pay a charge monthly to access personalized selection of shoes, jewelry and handbags. This site is said to have revenue of $25 million in 2010 and $70 million in 2011.

The website recently said to have $40-million investment from venture capital firm Andreessen Horowitz, who also happens to be invested in Facebook, Skype, Groupon, Foursquare and Twitter.