certified Triple Platinum by the  RIAJ . The leader of the group is  Kim Taeyeon . The other members are  Jessica Jung ,  Sunny ,  Tiffany ,  Kim Hyoyeon ,  Kwon Yuri ,  Choi Sooyoung ,  Im Yoona  and  Seohyun . Watch TaeTiSeo ‘Twinkle’ MV Official Making Film English Subs After clicking