UGK was a hip-hop act from Port Arthur, Texas formed in 1987 by the late Chad "Pimp C" Butler. He then joined with Bernard "Bun B" Freeman who became his longtime partner. They released their first major label album, Too Hard to Swallow in 1992, followed by several other albums charting on the Billboard 200 and Top R&B/Hip-Hop Albums charts, including the self-titled Underground Kingz album which debuted at number one on the Billboard 200 in August 2007. The group has also been featured on hit singles by other artists, such as on "Big Pimpin'" by Jay-Z and "Sippin' on Some Syrup" by Three 6 Mafia. On December 4, 2007, Pimp C was found dead in a Hollywood, California hotel room.