Kim Sang-woo (Hangul: 김상우, Hanja: 金相佑; born July 3, 1993), better known by his stage name Roy Kim (Hangul: 로이 킴), is a South Korean singer, songwriter, and radio presenter. He initiated his singing career after winning Mnet's talent competition series Superstar K4.[2] Kim is currently majoring business administration, and also plans to study sociology at Georgetown University.[3][4]