9. Princess Diana
Although Diana has been gone for more than twenty years, she is still near and dear to the hearts of millions of fans all around the world. Just prior to her death in 1997, she was thought to be worth approximately $22.5/£17 million due to the settlement she received following her divorce from Prince Charles. That money, along with the value of other personal belongings like jewelry, was passed on to her sons Prince William and Prince Harry who each received their inheritance on their 30th birthday.