From Faith Korpi on Popmatters:
"What distinguishes a fangirl from the average fan are unrivaled displays of devotion and a willingness to spend countless hours and dollars paying homage to those they love. Fangirls are typically ages 12 -18, or as The New York Times put it, “old enough to be culturally aware but not old enough to second-guess themselves... It may start as a crush or admiration, but what these girls end up being are the best publicists any celebrity could hope for. They will spread accolades all over the media free of charge. And to top it all off, they (or rather, their parents) will fund an artist’s big fat paycheck just by purchasing everything they put out on the market.