Claude says:The Marvelettes' "Please Mr. Postman" hit Motown's assembly line in 1961 and became the label's first number-one single, a restless, hand-clapped nervous energy that basically invented the girl-group sound Berry Gordy was chasing. You caught this one in September 2016 and let it spin exactly once — but that track has the kind of urgency that doesn't need repeat plays to stick.