Best-Selling Singles Quiz

The ten best-selling singles released in each decade from the 1950s to the 2020s, ranked by units certified by the national recording industry bodies rather than by claimed sales. Name each one with the artist and release year as clues, match each single to the artist credited with it, sort a selection by certified units, or tap an era's records out of a grid seeded with real Billboard year-end number-one songs that never reached their decade's top ten. The decade split is the source's own, and it is deliberate: certification totals favour the streaming era so heavily that an all-time list would be almost entirely recent. Certified figures count only markets that publish certifications, so they are a floor rather than a global total; no answer is named here.