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.
Yoon Chae-kyung Yoon Chae-kyung (born July 7, 1996), is a South Korean singer and actress. She originally debuted in 2012 as a member of Japan-based South Korean girl-group Puretty under DSP Media. She is also known as a contestant of "Kara Project" (2014) and "Produce 101" (2016).