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As hinted in their art film, their 2nd album is called 'Pink Tape' - suitable because the entire album, the jacket images, and even the album packaging all has to do with first love. The album's supposed to be like a romance movie with f(x) in it. 

As you all know already, "Rum Pum Pum Pum" is a pop dance song with an addictive guitar sound and percussion rhythm.

SHINee's Jonghyun and Key brought their witty charms as the special MCs for f(x)'s showcase 'f(x) Music Spoiler - Play! Pink Tape' held through Naver Music today at 11:11 AM KST. f(x) introduced and performed songs from their second full-length album 'Pink Tape' as well as unveiled the "Rum Pum Pum Pum" MV making-of clip.

Listen to the album tracks in the playlist below: