Mnet M Countdown' live broadcast preview was held at cj ENM Center in Sangam-dong, Mapo-gu, Seoul on the afternoon of November 15th.
TWICE (Nayeon, Jingyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chae Young and TZUYU) attended the ceremony.
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