Where do teen girls go for advice online? Enter Girlhood, a blog for teen girls, by teen girls.

Mia Sugimoto left the Barbie movie feeling inspired; she’d never seen the experience of girlhood depicted on screen before. The 17-year-old turned that inspiration into something tangible, a blog for teen girls, by teen girls: Girlhood. On the second day of her senior year of high school, Sugimoto spoke to Mashable with her greatest friend, …