This movie has some very talented singers, William Bell, Issac Hayes, Albert King, Rufus Thomas, Carla Thomas, The Emotions, The Bar Kay's, and more. The music was provided by the artists signed to the Stax/Volt label. It has some funny humor by Richard Pryor and a few actors you will see in this film/doc when they were young, either before they became actors or before they were famous, I am not sure which. If you like your funk strong then this is the movie to see.