Kim Hyuna (Hangul: 김현아; born June 6, 1992), better known by the mononym Hyuna, stylized as HyunA, is a South Korean recording artist, dancer, songwriter and model. She is the main rapper and singer of the Korean girl group, 4Minute and part of the musical duo, Trouble Maker. Hyuna first rose to fame as the lead rapper of the Korean girl group Wonder Girls, before she left in 2007 due to health issues. In 2008, she signed with Cube Entertainment and subsequently debuted with 4Minute a year later. Their debut single, "Hot Issue," went on to sell 4 million copies. She also became notable for her solo career, with her debut single, "Change" reaching sales of over 2 million copies. She describes her solo career as "performance-oriented music."