f(x) is the new girl group from SM Entertainment which debuted this September 1st with their 1st digital single LA cha TA.

The Asian pop dance group ‘f(x)’ is made up of international members including Korean members—Sulli, Luna, Krystal—and Chinese members—Amber (Chinese American), and Victoria. Their group name ‘f(x)’ is uniquely written like the mathematical symbol for ‘function’, which portrays the members’ passion to unfold eclectic performances throughout not only Korea but also Asia based on their various talents that could be applied in to the equation as ‘x’, to yield unexpected results.

From: f(x) official website