해피선데이
In addition to promoting her album, Chae Yeon has also joined the cast of "Hi-Five", part of KBS's "Happy Sunday" line-up. On the reality-variety show, which also stars Hyun Young, the stars attempt to succeed in various tasks, including starring in a musical, becoming flight attendants, and performing action movie stunts. She remained a part of the show until its cancellation in 2008.