On today's episode of Music Core, the girls of After School returned on stage for their goodbye performance. This might be our last time seeing these girls together for quite a while, so enjoy their bangin' Bang! performance! http://www.youtube.com/watch?v=ZBY5KBy1bYQ And their Music Bank performance on June 4th. http://www.youtube.com/watch?v=T_wDrGeiWSc As reported recently, the girls will now split up into subgroups to promote in two three-member groups, and a solo singer. The first unit division will be revealed as soon as next week, so stay tuned to allkpop.com!