에프엑스) is a five-member multi-national K-pop girl group formed by S.M. Entertainment in 2009. The group consists of Victoria, Amber, Luna, Sulli, and Krystal. Their music is best known for its fusion electro pop sounds. In 2013, the group's second album, Pink Tape, was the only K-pop album chosen by the American music channel Fuse to be among the "The 41 Best Albums" of the year.