KBS 2TV Music Bank' rehearsal was held at the public hall of Yeouido KBS New Pavilion in Yeongdeungpo-gu, Seoul on the morning of November 16th.
Singer Chae Yeon attends the rehearsal on the day.
About Chae Yeon
Chae-yeon Lee, best-known mononymously as Chae Yeon, is a Korean pop singer who rose to fame with her hit single "Two of Us" in 2004 with her wave dance style.
 Wikipedia