Yoo Gun-hyung (Hangul: 유건형; born February 14, 1979) is a South Korean recording artist and record producer, best known for his work with PSY, and, in particular, their international hit Gangnam Style.

Biography

Yoo Gun-Hyung was introduced to the world of K-pop in 1996 as one-half (along with Suh Jung-Hwan) of the Korean hip hop duo Untitle.^[1] Yoo and Suh were both still in high school, and gained particular recognition in the Korean music industry because they were already writing their own songs.^[2] Their second album, entitled The Blue Color was released in 1997.^[3] Untitle disbanded in 1999.^[3]

Yoo's collaboration with PSY goes back at least to 2006, with Yoo writing music and PSY writing lyrics for songs on the 2006 album PSY – We Are The One.^[4] They have also co-written songs for IVY,^[5] Kim Jin Pyo,^[6] and Ulala Session.^[7]

It has also been reported that Yoo and former Untitle co-member Suh have been working with Jang Woo Hyuk (formerly of H.O.T.) on a solo project.^[8]

"Gangnam Style", the lead single of PSY 6 (Six Rules), Part 1, which Yoo co-wrote with PSY, was released on July 15, 2012, and the music video was uploaded to YouTube the same day.^[9] Within weeks, the video had made it to No. 3 on YouTube's music video list.^[9] Then in August, the video went viral outside of the Korean-speaking world, and by September had become the most "liked" video in the history of YouTube.^[10]