Mnet M Countdowndown pre-rehearsal was held at CJ E&M Center in Sangam-dong, Mapo-gu, Seoul on the afternoon of the 20th.
Singer Weki Meki, Abauchu, Lee Kyung, Moonbyeol, Dream Catcher, Girl of the Month, Pentagon, Cherry Blett, Girlfriend, KARD, Everglove, Berryberry, H & D, Golden Child and Eyes One attended the ceremony.
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M Countdowndowndown PhotoTime