South Korean girl group F(X) makes dance-oriented pop music. Formed in 2009, the group features five vocalists who go by their first names: Victoria, Amber, Luna, Sulli, and Krystal. The quintet released two EPs before delivering their full-length debut album, Pinocchio, in 2011. In 2013, they returned with their sophomore album, Pink Tape, which included the single "Rum Pum Pum Pum." ~ Matt Collar