Kim Hyung-joong is a South Korean singer-songwriter born on April 22, 1973, in Seoul, South Korea. He debuted in 1993 as a member of the group E.O.S with the album 꿈, 환상, 그리고 착각, and later gained wider recognition as a guest vocalist for Toy in the albums A Night In Seoul (1999) and Fermata (2001), singing hit tracks such as "좋은 사람". He began his solo career with the album Kim Hyung Joong 1(2003), followed by Kim Hyung Joong Vol. 2 (2004), The Dream Of Heaven (2006), Polaroid (2009), and Best & Last (2013). His representative singles include "그랬나봐"(2003), "그녀가 웃잖아"(2004), "그대만을"(2003), and "연인 (戀人)"(2003). He also participated in the vocal project group Project Friends from 2011 alongside Kim Yeon-woo and Byun Jae-won, and contributed as a guest vocalist to works by Yoo Hee-yeol, who composed songs such as "그랬나봐"and "좋은 사람" specifically for his voice.