|Single by f(x)|
|Released:||April 17, 2011|
|Recorded:||2011 at S.M. Studios, Seoul, South Korea|
|f(x) singles chronology|
Currently, the single is included in Superstar SMTOWN.
The music video shows f(x) dancing choreography by Jillian Meyers, her first work with f(x). The video features two dance sets, one with white carved walls, manual-rotating fans and pyramids on the floor and in the background, another one white set with swirling black and white, and five individual sets (one for each member). Victoria is in an orange room with different boxes, Amber is in a white room with black drawings, Luna] is in a red room with checkered red flooring, Sulli is in a hexagon blue-green and pink room, and Krystal is in a blue triangular room.