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Booker T. & the MG's were the house band for Stax Records, but they released some albums under their name. They recorded this in the mid-'60s and reworked it in the late-'60s as the theme for the film Up Tight.
After the demise of Booker T. & the MG's, band members Steve Cropper and Donald Dunn joined The Blues Brothers (John Belushi and Dan Aykroyd), who used this in the introduction to their live show. (thanks, Edward Pearce - Ashford, Kent, England, for above 2)