Melvin McClelland was a rhythm and blues singer known for his 1973 song "Reward/Synthetic Substitution", the B-side of which was heavily sampled in at least 94 hip hop songs such as "Real Niggaz Don't Die" and "Alwayz into Somethin'" by N.W.A, "O.G. Original Gangster" by Ice-T, "O.P.P." by Naughty by Nature and more recently "My Life" by 50 Cent, Eminem and Adam Levine. Wikipedia