Blues Brothers - I don't know

Blues Brothers Live at the RR Convention, LA, 1979 Jake Blues-Lead vocals Elwood Blues-Vocals and Harmonica Steve Cropper-Guitar Matt Murphy-Guitar Donald Dunn-Bass Steve Jordan-Drums Paul Shaffer-Keyboards Lou Marini-Sax Tom Malone-Trombone and Sax Alan Rubin-Trumpet Tom Scott-Sax