What era counts as doo-wop oldies music?

The popular era of doo-wop music was the 1950s and early 1960s. Notable doo-wop artists included The Chordettes, The Platters, The Drifters, The Cadillacs, and Dion and the Belmonts.

Doo-wop is a style of rhythm-and-blues music that was developed in African-American communities in the 1940s. With gospel, swing and a capella influences, the genre is defined by vocal group harmony and simple beats. Doo-wop grew throughout the 1950s when young singers from communities in Chicago and New York City came together and formed vocal groups. The genre peaked in the early 60s with hits such as "Duke of Earl," "You Belong to Me" and "Barbara Ann."