After a long absence, f(x) is finally back with their brand new first studio album, "Pinocchio" and starting promotions once again on tonight's Mnet's M! Countdown. Their electronic pop dance track features a powerful yet restricted beat with a unique guitar sound that brings out the diversity in f(x)'s voices. Their lyrics also add an interesting element to the performance in that it compares the process of getting to know their crush to the process of constructing their own Pinocchio doll. Check out their comeback stage which also includes "Gangsta Boy"! Source: Daum Music