Also the name of a popular American-based girls magazine.

Seventeen features articles on fashion, beauty, celebrities, love, sex, and other things that would be of interest to teen girls.

Issues are monthly (so, 12 a year).

Seventeen is based in New York and is a part of PRIMEDIA, a company which publishes hundreds of magazines.

As for why a 20-something male like me knows anything about Seventeen, I helped them with public relations campaigns at a previous job.