23. Eric B. and Rakim, "I Know You Got Soul"
"When I'm writing I'm trapped between the lines/I escape when I finish the rhyme," explains Rakim, rocking the sort of jam that disappeared once copyright lawyers stepped up their game. Eric B. built this landmark 1987 track by looping a chunk of the James Brown-produced song of the same name (recorded in 1970 by Bobby Byrd and the J.B.'s). But turnabout is fair play: British mixmasters M/A/R/R/S built their hit "Pump Up the Volume" around a sample of Rakim saying that phrase on "I Know You Got Soul."