Jung Joon-young (Hangul: 정준영 Hanja: 鄭俊英 born February 21, 1989) is a Korean rock singer, songwriter and radio DJ, who was born in Indonesia, but raised in China, Europe (England and France) and the Philippines. Jung has lived in ten different countries because his father was an international business man. He had a lonely childhood but learned how to speak five different languages such as English, Chinese, Japanese, Filipino and Korean.

When he taught songs to the children in Philippines at the age of seventeen, he started his dream to be a rock star. He went to South Korea at the age of 19 and assembled his own band "Flowermist" (later "Switch-on") and performed in amateur club theatres as well as busked on the streets in Japan. To achieve his goal of becoming a rock star he worked as a model and appeared on television.

Jung Joon-Young finished in third place on Superstar K4 and since then he has been doing concerts, TV and radio programs(as a guest or a host) and modeling for cars, clothes, games and N-screen. From May 6, 2013, he worked as a DJ for MBC FM4U Close Friend until September 1, 2013. He has appeared on several TV shows including KBS2's "Immortal Song-Singing the Legend 불후의 명곡", "Happy Together 해피투게더" and MBC's "We Got Married 우리결혼했어요" and has been emerging as a versatile entertainer recently.

After signing with CJ E&M, Jung Joon-young released his first debut single "Spotless Mind (병이에요)" with two versions of Music Video(N version and S version) on Oct 01, 2013 and immediately made an impact on the country’s charts. Just an hour after release, “Spotless Mind” nabbed the top spot on Mnet, Bugs and Soribada etc.

(from Joon Young Wikipedia)