For New York Mag's fashion issue this year, the magazine chose blogger Tavi Gevinson to feature on the cover. Truly, you can't even call Tavi a "blogger" anymore. Sure her beginnings were made in the online world, but since her arrival on the scene she has become so much more. She's started a magazine, given a TED talk, appeared on the small screen and is now taking on Broadway. Oh, and she's only 18 years old. Yeah, she was doing more at the age of 12 than most 24 year olds.