Francoise Bettencourt Meyers, the 64-year-old heiress of French cosmetics company L'Oreal, has become the world's richest woman with a net worth of $43.3 billion. This comes days after her mother and the world's richest woman, Liliane Bettencourt, passed away at the age of 94. Liliane Bettencourt had a fortune of over $45 billion when she passed away on Thursday.