4. At age 20, Selena has already built a mini empire. She’s conquered the worlds of TV, music, fashion and next up is a renewed focus on her movie career. But there’s also a lot about Gomez that hasn’t made headlines: She’s currently the youngest-ever U.S. ambassador for UNICEF and that is only a fraction of her charitable efforts. Glamour is proud to honor her as a 2012 Woman of the Year. In the issue, Selena talks about her simple up-bringing, charity work, fans, best friend Taylor Swift, and of course, Justin Bieber. Glamour’s December issue is available on newsstands nationwide and digitally on November 6th. 2. Taylor Swift graces the cover of Cosmopolitan’s December 2012 issue.