Girls' Generation (Korean: 少女時代;소녀시대) is a South Korean nine-member girl group formed by SM Entertainment in 2007. Its members include Yoona, Tiffany, Yuri, Hyoyeon, Sooyoung, Seohyun, Taeyeon, Jessica, and Sunny. They are commonly referred to as SNSD, the acronym of the group's Korean name So Nyeo Shi Dae or So Nyuh Shi Dae.
The group has released two albums and various singles. Their biggest song is "Gee", which is the longest-running #1 song on KBS's Music Bank, at 9 weeks total.
The members of the group have had various activities as solo entertainers — acting in various dramas and musicals, hosting various reality-variety shows, and releasing solo singles.