Joel Whitburn’s Record Research Books includes a 30-second sound bite from every number one hit from 1955-1969. The clips end abruptly, but it’s still a good way to refresh your memory with a blast from the past.
While the clips end with 1969, the site lists every number one from 1955 to the present; from Let Me Go Lover by Joan Weber to That’s Yeah! by Usher Featuring Lil’ Jon & Ludacris (today’s number one), 49+ years later.
Whitburn is stingy with other data from his too expensive but invaluable books.