Roots of Dee Dee Warwick

Tracy Nelson is an American country and blues singer. She has been involved in the recording of over 20 albums in her recording career, which started in 1965.

Jerry Williams Jr., generally credited under the pseudonym Swamp Dogg after 1970, is an American country soul and R&B singer, musician, songwriter and record producer. Williams has been described as "one of the great cult figures of 20th century American music."

Lorraine Ellison was an American soul singer and songwriter known for her recording of the song "Stay with Me" in 1966.

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.