The O'Jays

The O’Jays spearheaded production team Gamble and Huff’s Philly-soul revolution in the early ’70s, but only fans on board from the start (before "Back Stabbers" and "For the Love of Money") remember that singers Eddie Levert and Walter Williams actually blew into Philly from Cleveland. No matter: It’s those springy, string-outfitted grooves that still make the aging crowds yell.