Mnet M Countdown' live rehearsal was held at E & M Center in Sangam-dong, Mapo-gu, Seoul on the afternoon of September 13th.
Hyomin was very sorry on this day.
Jang Kyung Ho
About Hyomin
Park Sun-young, known professionally as Hyomin, is a South Korean singer, songwriter and actress. She is a member of South Korean girl group T-ara.
 Wikipedia