The girls of After School have been teasing us with their bright blue uniforms as they recently revealed their third single Bang!'s MV teaser on the 21st. With five months of lessons on learning how to drum, the girls have been practicing hard for their much anticipated comeback. Well, their anticipated track and MV of Bang! was finally revealed today! With the drum beats along with the girls' sexy uniforms, I'm sure you guys will enjoy it! Check it out below! http://www.youtube.com/watch?v=L6_9IhH_Mq0 Watch Kahi and JungAh rehearsing. http://www.youtube.com/watch?v=kO_6eM5VL8U Stay tuned to their comeback performances on this week's Music Bank and Inkigayo! [gallery]