Priscilla Chan (not to be confused with the Hong Kong pop singer of the same name), has a net worth of $14 billion. That net worth is of course mostly explained by her recent marriage to founder of Facebook Mark Zuckerberg, who famously became a billionaire thanks to the mega popular website he created. But Chan has had a pretty interesting career in her own right as a medical student. Her commitment to medicine and health, according to popular lore, influenced Zuckerberg in adding an organ donor registry to Facebook. Chan met Zuckerberg while studying biology at Harvard, which she later graduated from with a degree in that field of study. After teaching science for about a year, Chan decided to go to medical school at the University of California, San Francisco. Having only just recently graduated in the spring of 2012, she is set to begin her career as a pediatrician very soon. Her career choice is all the more commendable given that as the wife of the ulta-rich Zuckerberg, she doesn't "have to" work at all – and yet she chose a career that will allow her to help many children and their families. It's not every day you see that kind of altruism in the rich and famous.