3. Aerin Lauder
Aerin Lauder is the granddaughter of Estee and Jospeh Lauder, the co-founders of the cosmetics mogul Estee Lauder. The 47-year old is currently estimated to be worth $1.85 billion. She is the style and image director for the Estee Lauder companies, and has also founded her own brand called AERIN which sells fashion, cosmetics, and home furnishings.
4. Charlotte Casiraghi
Currently ranked eighth in line to the throne of Monaco, Charlotte Casiraghi is said to be worth about $5.7 billion. She is the daughter of Caroline, the Princess of Monaco and Stefan Casiraghi, an Italian industrialist. She has participated in several equestrian events and has also dabbled in journalism.