Roots of Billy Paul

The Three Degrees is an American female vocal group formed circa 1963 in Philadelphia, Pennsylvania. Although several women have been members over the years, the group has always been a trio. The group were particularly successful in the UK, achieving 13 Top 50 hit singles between 1974 and 1985.

Kenneth Gamble and Leon A. Huff are an American songwriting and production duo credited for developing the Philadelphia soul music genre of the 1970s. In addition to forming their own label, Philadelphia International Records, Gamble and Huff have written and produced 175 gold and platinum records, earning them an induction into the Rock and Roll Hall of Fame in the non-performer category in March 2008.