At the beginning of September 2018, I stumbled upon a Spotify playlist called Every Number One Song on Billboard created by harveydent,da. As a musician and a data junkie, I’d always been fascinated by the Billboard Hot 100 number ones, but harveydent,da gave me an effective tool to search through and listen to them. So that’s what I did. I started searching and listening. Not methodically but randomly. And I was surprised with what even cursory searches turned up.