1. Gigi Hadid and Bella Hadid
20-year-old Gigi (Jelena Noura Hadid) and her 19-year-old sister Bella are rocking the modelling world. Born in LA, these two girls are marking their territory on runways all over the world. Children of Real Estate tycoon Mohamed Hadid and former model Yolanda Foster, these two girls have already made their own millions before even turning 20!