f(x) (band)

f(x) or F(x) (; Korean: ) is a K-pop girl group formed by S.M. Entertainment in 2009. The group is composed of four (formerly five) members: Victoria, Amber, Luna and Krystal. They have been recognized as "the most reliably risk-taking act in K-Pop" due to their experimental fashion and their eclectic, electropop sound. Each member has also participated in other forms of entertainment, such as acting and television hosting.