Girl group SISTAR guest stars on "Gag Concert."

SISTAR participated in the recording of KBS' "Gag Concert" yesterday. An official of "Gag Concert" stated, "SISTAR is to make a surprise appearance on the 'Discovery of Life' segment. As the segment features new appearance each week it was revealed that SISTAR gladly accepted the opportunity to appear on the show."

On the day of the recording Hyorin, Dasom and Soyou except Bora was present. Bora couldn't participate in the recording due to her overlapping schedule for her fixed appearance on KBS entertainment program "Invincible Youth 2."

"Gag Concert" episode featuring SISTAR is set to air on September 2.