Roots of Lou Rawls

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.

Robert Alvin Von Hebb was an American R&B and soul singer, songwriter and musician, best known for his 1966 hit "Sunny".

McFadden and Whitehead were an American R&B duo, best known for their signature tune "Ain't No Stoppin' Us Now". They wrote and produced some of the most popular R&B hits of the 1970s, and were primarily associated with the Gamble and Huff record label, Philadelphia International Records.