Girls' Generation (Sonyeo Sidae ) is a nine-member South Korean girl group formed by SM Entertainment in 2007. The nine members are: Taeyeon, Jessica, Tiffany, Sunny, Yuri, Hyoyeon, Seohyun, Sooyoung and Yoona . They are often referred to as SoShi (??), or SNSD (mainly outside Korea), the first of which is an abbreviation and the second an acronym of the group's Korean name So Nyeo Shi Dae. In China and Taiwan, they are known as ???? (Shàonu"( Shídài; or Siu Nui Si Doi in Hong Kong) and in Japan as ???? (Sho-jo Jidai).