The song "Gashina" was recorded by a South Korea singer that was a member of what group in 2007?
Sunmi Lee Sun-mi (born May 2, 1992), referred to as Sunmi, is a South Korean singer. She debuted in 2007 as a member of South Korean girl group Wonder Girls and left from the group in January 2010 to pursue her academic career.
Chen (singer) Kim Jong-dae (born September 21, 1992), better known by his stage name Chen, is a South Korean singer-songwriter and actor. He is a member of the South Korean-Chinese boy group EXO and its sub-unit EXO-CBX, as well as S.M Entertainment's ballad group SM the Ballad.