Shaft

It tells the story of John Shaft (Richard Roundtree), a tough African-American private detective who travels through Harlem and infiltrates The Mafia in order to find the missing daughter of a black mobster. Also in the cast are Moses Gunn as Bumpy Jonas, Charles Cioffi as Lt. Vic Androzzi, and Christopher St. John as Ben Buford, along with Gwenn Mitchell and Lawrence Pressman. Isaac Hayes did the theme song quoted above, which has reached Memetic Mutation to the point where it may actually be better known than the movie. It also earned Hayes the "Best Original Song" Oscar, the first ever awarded to a Black musician.

Example of:
Blaxploitation