Girl group f(x)'s new song, "Rum Pum Pum Pum" ranked number 1 on two of U.S. Billboard's charts.

Their new title song, "Rum Pum Pum Pum," which was released on July 29, has been gaining much attention in not only in Korea but also in the U.S. 

Alongside their numerous wins on Korea TV music programs, they were also seen ranked number 1 on the U.S Billboard K-Pop 'HOT 100' chart as well as the U.S. Billboard World Albums chart, showing off their global popularity.

This new song was also choreographed by a world famous choreographer and has gained much attention for their dance moves. 

"Rum Pum Pum Pum" is a pop dance song which compares first love to growing one's wisdom teeth.