f(x) (/ˌɛf ˈɛks/ / 에프엑스) is a K-pop girl group formed by S.M. Entertainment in 2009. Initially debuting as a five member Victoria, Amber, Luna, Krysta and Silli, as of July 25, 2014 SM Entertainment announced Sulli would be taking a temporary hiatus from the Korean entertainment industry. The group is currently composed of four members after Silli withdrawn from the group.
The group held their first official stage as a 4-member
group On August 9, at the " 2015 London Korean Film Festival: Imagine Your Korea"
event, giving a free performance at Trafalgar Square to celebrate the
festival.
SM Entertainment confirmed that f(x) is planning to
release their fourth studio album On August 13, (and first as a 4-member group)
