Gene McFadden and John Whitehead's unstoppable 1979 hit was the last great gasp of Philly soul, with funky bass and sweeping orchestral melodies fueling a stomping disco beat and a glorious, unforgettable chorus. This epic sendoff to the decade of excess was also used as the theme song for the Philadelphia Phillies, Eagles and 76ers. – Mosi Reeves, Google Play