소녀시대, also known as 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. They gained fame for their catchy songs and impressive performances, becoming one of the leading acts in the K-pop genre. The group is known for hits like "Gee," "Genie," and "I Got a Boy," which helped them achieve both national and international success. Over the years, they have won numerous awards and have contributed to the global popularity of K-pop. Although the group has seen changes in its lineup, they remain influential in the music industry.