Joo

Jung Min-joo (born October 11, 1990), born Jung A-rin and known professionally as Joo, is a South Korean singer, songwriter and musical actress. In 2006, she became a contestant on JYP Entertainment's Superstar Survival. Although she didn't win, she was accepted as a trainee at JYP Entertainment. After two years of training, Joo debuted as a soloist with her single album Young Girl in January 2008. However, she resumed training for two years, as she didn't feel ready for her debut. Joo later returned in January 2011 by releasing her EP Heartmade.