The O'Jays are an American R&B group from Canton, Ohio, formed in Summer 1958 and originally consisting of Eddie Levert, Walter Lee Williams, William Powell, Bobby Massey, and Bill Isles. The O'Jays made their first chart appearance with the minor hit "Lonely Drifter" in 1963, but reached their greatest level of success once the producers Gamble & Huff signed them to their Philadelphia International label in 1972. With Gamble & Huff, the O'Jays emerged at the forefront of Philadelphia soul with Back Stabbers (1972), and topped the US Billboard Hot 100 the following year with "Love Train". Several other US R&B hits followed, and the O'Jays were inducted into the Vocal Group Hall of Fame in 2004, The Rock and Roll Hall of Fame in 2005, and the Rhythm and Blues Music Hall of Fame in 2013.

Kenneth Gamble and Leon A. Huff are an American songwriting and production team 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.