Chung Chae-yeon of the girl group 'Dia' attended the rehearsal of Mnet 'M Countdown' held at CJ ENM Center in Sangam-dong, Mapo-gu, Seoul on the afternoon of the 18th.
On this day, 'M Countdown' will feature Kim Sung Ri, Hot Place, Holiday, Bandit, 1TEAM, JBJ95, Everglow, Pentagon, Stray Kids, Wonder Nine and Momo Land.