소녀시대 (Girls' Generation) is a popular South Korean girl group formed by SM Entertainment in 2007. The group originally consisted of nine members: Taeyeon, Sunny, Tiffany, Hyoyeon, Yuri, Sooyoung, Yoona, Seohyun, and Jessica, who later left the group. They are known for their catchy songs, impressive choreography, and strong vocal performances. The group gained immense popularity both in South Korea and internationally, contributing to the rise of the K-pop genre. Their hit songs include "Gee," "Genie," and "I Got a Boy." Over the years, they have won numerous awards and have become influential figures in the music industry.