As one would expect from a Microsoft heiress whose dad is worth around $123 billion, Phoebe Gates leads quite the plushy life. But the youngest daughter of Bill and Melinda Gates certainly isn't your typical Do-You-Know-Who-My-Dad-Is rich girl. The 19-year-old, who has, for the most part, stayed out of the public eye, has recently begun using her last name, influence, and social media platform to boldly speak out about women's issues both in the U.S. and across the world. Smart, stylish, and passionate - this Gen Z It Girl is seriously one to keep your eye on.