This funk-and-soul supergroup, co-founded by a set of brothers in Chicago, was known for horn-driven arrangements, tight vocal harmonies, and Egyptian-inspired stage shows throughout the 1970s.

The song in question came out in the year 19__.

To earn this title, a single first has to break into the upper tier of the industry's flagship sales-and-airplay chart, then keep moving until the RIAA credits it with a million units sold.