Girl group f(x) has ranked number 1 for the August monthly chart.

On September 2, it was released that f(x)'s "Rum Pum Pum Pum" was ranked number 1 for the August chart on Melon.

"Rum Pum Pum Pum" is a song that compares first love to the pain of a wisdom tooth.

Followed right behind was Crayon Pop with " Bar Bar Bar."

f(x) is the fourth girl group this year to top the monthly chart.

The top 10 included 5 idol teams this month, showing the popularity of idol groups.