Long before B.B. King earned his title as "King of Blues," he began his career performing advertising jingles and working the DJ booth at WDIA in Memphis, Tenn., the first black radio station in the United States.
Comedian Bill Cosby, right, and singer-guitarist B.B. King do a duet Friday, July 3, 1981 at New York's Carnegie Hall during a blues concert which Cosby hosted. The concert was part of the Kool Jazz Festival.