TWICE Sana, who attended Mnet M Countdown' rearsal at CJ E & M Center in Sangam-dong, Seoul on the afternoon of the 15th, is entering.
About TWICE
Twice is a South Korean girl group formed by JYP Entertainment. The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu.
 Wikipedia