UGK were one of the South's most influential groups. Artists like T.I. call themselves UGK alumni. Composed of Pimp C and Bun B, the Houston area duo released several LPs that resonated regionally in the '90s and first tasted commercial success with 1996's Ridin' Dirty. Memorable guest appearances on JAY Z's “Big Pimpin'” and Three 6 Mafia's “Sippin' on Some Syrup” gained them a wider audience in 2000. Following Pimp C's incarceration for a probation violation, Bun B went on a tear via guest appearances, including Beyoncé's No.1 hit , “Check on It.” Bun's omnipresence combined with a “Free Pimp C” movement supported by southern artists made UGK's brand even stronger. Their 2007 single, “International Players Anthem (I Choose You)” was nominated for a GRAMMY® in 2007. Sadly, Pimp C died of an overdose of cough syrup and preexisting sleep apnea later that year.