Spearheaded by the songwriting/production team Gamble & Huff, the Philly soul renaissance produced almost impossible volumes of great music throughout the ’70s, the biggest and most memorable of which came from

Despite outlandish costumes, publicity stunts and multiple musical-direction changes, Patti LaBelle and her band Labelle couldn't seem to break out in the 1970s. Then they released “Lady Marmalade” and everything changed. The single...