As far as legacy acts go, Girls’ Generation is undoubtedly one. In 2007, when K-pop was largely a boys’ playground, in marched this defiant nonet — Taeyeon, Sunny, Tiffany, Hyoyeon, Yuri, Sooyoung, Yuna, Seohyun, and former member Jessica — who not only redefined the game for women in K-pop but also