fashionista

noun2

1. •
   A person who dresses according to the trends of fashion, or one who closely follows those trends.
2. •
   A person who creates or promotes high fashion, i.e. a fashion designer or fashion editor.

   • Toronto fashionista Suzanne Boyd, editor-in-chief of the soon-to-be-launched Zoomer magazine, recently moved back to Canada after living in Manhattan for the past four years. — 2008