Besides hosting and producing Soul Train, Don Cornelius also commissioned the show's theme song, "TSOP (The Sound of Philadelphia)", recorded by Philadelphia soul studio group MFSB, with vocals by the Three Degrees. Released as a single, this song became a pop and R&B radio hit in 1973. Soul Train used "TSOP" until around 1977, then used other theme songs before switching to "Up on Soul Train" by the Whispers, in 1980. For several seasons beginning in 1983, the program switched to another theme created by R&B artist O'Bryan. This lesser-known theme to the program, "Soul Train's a Comin'" , had a funkier beat and a stronger bass line. In 1987, George Duke composed the first remake of "TSOP", known as "TSOP '87", and Duke also remixed the theme into a newer version ("TSOP '89") in 1989. "Soul Train '93" (You Know You Want to Dance)" performed by the rap group Naughty by Nature with a saxophone solo by Everette Harp, was introduced in 1993. More recently, another updated version of "TSOP", "TSOP '03", has been used.www.lanier2.imeem.com