Emily Tressa, 17, is finally living her best life. Since the time she was a child, Tressa knew she was a girl, although she was assigned male at birth. The YouTuber has been documenting her transition, and now has a huge milestone to share: She is one of the youngest people to undergo gender confirmation surgery. Dr. Jess Ting, who performed the surgery at Mount Sinai Hospital in New York, called her a "pioneer." "For me, it feels almost like I'm finally fully complete now," Tressa said.