Kim So-jung (; born June 2, 1989) is a South Korean singer. She is known as a finalist (Top 11) of Mnet's Superstar K2. She is one of the few in the industry who did not follow the trainee-debut system. She released her first EP, Herrah's on May 21, 2012.
She was still a student of KAIST when she participated in Superstar K2. She was on leave from studying due to the show but she resumed her student life in 2011 September and has graduated with a degree in data processing.