Claim to fame: This list wouldn't be complete without the epitome of the Manhattan socialite: a billionaire heiress who gets her last name from the most recognizable businessman in New York City. But what sets her apart from the art-gallery/fashion-show going crowd living out of their daddy's pockets is that she's a businesswoman in her own right as the Executive Vice President of Development & Acquisitions at The Trump Organization. Either that or glorious twos.