KBS 2TV Music Bank' rehearsal was held at the public hall of KBS New Pavilion in Yeouido, Yeongdeungpo-gu, Seoul on June 29th.
On that day, Baek Ji-young attended the rehearsal.
Jung Yu-jin
About Baek Ji-young
Baek Ji-young, also known as Baek Z Young, is a South Korean singer. She made her debut in 1999, with the release of her album Sorrow.
 Wikipedia