SHEIKHA MAITHA BINT MOHAMMED BIN RASHID AL MAKTOUM OF THE UAE

Maitha is not someone to mess with! Watch your step around the 38-year-old daughter of Sheikh Mohammed bin Rashid Al Maktoum, prime minister and vice president of the United Arab Emirates and ruler of Dubai — who is not only an avid polo player, but also a karate and tae kwon do pro!