Jimmy Fallon hosted teen blogger Tavi Gevinson on his “Late Night” show recently, and in doing so learned that he has an inner teen girl just screaming to get out.

Gevinson, who created the online magazine TheStyleRookie, talked about how she became interested in fashion, the journey to creating a blog with thousands of followers at the tender age of 11, and what it’s like to be a 16-year old girl with chronic bitchface. The rest is pure Fallon gold. Check it out, and check out Gevinson’s work for a very interesting, charming, funny read.