Nu ABO is the debut extended play by South Korean girl group f(x). It was released on May 4, 2010, in South Korea under the record label of SM Entertainment and distribution label of KMP Holdings. The extended play spawned the title track of the same name. Commercially, the EP peaked at number two on the Gaon Album Chart and sold over 54,000 copies by 2016.
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f(x) (; Korean: 에프엑스; RR: Epeuekseu) is a South Korean girl group, consisting of Victoria, Amber, Luna, Krystal, and previously Sulli until her departure from the group in August 2015. Formed by SM, f(x) officially debuted in September 2009 with the release of the digital single "La Cha Ta".
f(x) performing at Jeju K-pop Festival in October 2015 From left to right: Victoria, Krystal, Amber, and Luna
f(x) with Girls' Generation at a showcase for the LG Chocolate cellphone
f(x) in December 2011
F(x) performing as a four-piece group in Trafalgar Square, in August 2015.