Startup(s): Viddy

Sports bars, basketball teams, liquor, clothes—Jay-Z has his and in a lot of pots. Most recently, he's turned his attention to the tech world. He's invested money in Duracell's Powermat division and also signed on as the brand's spokesperson. But Hov's also shown love to the little companies. Earlier this year it was reported that Jay, along with Will Smith, invested money in the video-sharing app Viddy.