Roots of Phil Upchurch

The Dells were an American R&B vocal group. Formed in high school in 1953 by founding members Marvin Junior, Verne Allison, Johnny Funches, Chuck Barksdale, and Michael and Lucius McGill, under the name the El-Rays. They released their first recording in 1954 and two years later had their first R&B hit with "Oh What a Night". After disbanding due to a near-fatal car crash in 1958, the band re-formed in 1960 with Funches being replaced by Johnny Carter. This lineup remained together until Carter's death in 2009. In 2004 the Dells were inducted into both the Rock and Roll Hall of Fame and the Vocal Group Hall of Fame. The group performed until illness forced longtime lead singer Marvin Junior and bass vocalist Chuck Barksdale into retirement, ending the group's 60-year run.

Dee Clark was an American soul singer and songwriter best known for a string of R&B and pop hits in the late 1950s and early 1960s, including the song "Raindrops", which became a million-seller in the United States in 1961.

Riley B. King, known professionally as B. B. King, was an American blues guitarist, singer, songwriter, and record producer. He introduced a sophisticated style of soloing based on fluid string bending, shimmering vibrato, and staccato picking that influenced many later electric guitar blues players. AllMusic recognized King as "the single most important electric guitarist of the last half of the 20th century".

Gene Chandler is an American singer, songwriter, music producer, and record-label executive. Chandler is nicknamed "the Duke of Earl" or, simply, "the Duke." He is best known for his most successful songs, "Duke of Earl" and "Groovy Situation", and his association with the Dukays, the Impressions, and Curtis Mayfield.