18: Kiana Cabell, from Kopari Beauty
To say Kiana loves coconuts would be an understatement. The Kopari co-founder practically grew up on the stuff while being raised on the beaches of Honolulu, Hawaii and spending summers living on a catamaran in Kauai with her Hawaiian surfing legend dad. While most kids spent school breaks at summer camp, Kiana used her spare time collecting wild coconuts from the jungle and using their contents to whip up amateur beauty concoctions. She realized early on that the natives of her tropical locale owed their gorgeous skin and hair to their stripped-down, simplified beauty routines—most of which included a whole lot of coconut oil.