"Sing a Song" (1975)
Gratitude, EWF's 1975 double album, showcased three sides of the best live material from their busy year of touring. But tucked away on the fourth side is a quintet of studio gems, led off by the shimmering "Sing a Song." Guitarist Al McKay came up with the track's signature riff while in his dressing room prior to a show, before presenting the tune to Maurice White for lyrical input. White kept the words simple and optimistic, penning an infectious disco-flecked jingle praising the healing power of music. Produced with his old Chess Records colleague Charles Stepney, White replicated — and updated — the classic sound he created for Etta James and Fontella Bass a decade before. The result was a triumph that reached Number One on the Billboard R&B charts and pushed Gratitude past the 3 million sales mark.