Having been away since the start of the year, the T-ara girls are back on the stage of KBS Music Bank with their latest infectious title track, "Roly-Poly". The girls' newest concept is refined 1970s club-hoppers, and they are targeting music fans both young and old with this retro concept and hope to make it a national song. Their title track, "Roly Poly", which was was co-produced by Shinsadong Tiger and Choi Kyu Sang, was purposely kept simple in both melody and choreography to create an addictive effect. The track's mellow beat and subtle electronic touch are enough to transport any listener to the times of flashing disco balls and Saturday Night Fever. Core Contents Media explained, "'Roly Poly' features an addictive but easy to follow melody that will catch the attention of listeners of all ages." Check out their comeback stage below! [gallery columns=4]