Listen to Rum Pum Pum Pum 첫 사랑니 (Originally Performed by f(x) 에프엑스) [Karaoke Version] online. Rum Pum Pum Pum 첫 사랑니 (Originally Performed by f(x) 에프엑스) [Karaoke Version] is an English language song and is sung by Karaoke K-Pop Bar. Rum Pum Pum Pum 첫 사랑니 (Originally Performed by f(x) 에프엑스) [Karaoke Version], from the album All K-Pop Karaoke, was released in the year 2013. The duration of the song is 3:24. Download English songs online from JioSaavn.