Andy Williams needs a caveat before anything else. He was one of the most successful easy-listening singers of the twentieth century, with a long television career, a shelf of gold records, and signature songs including his beloved reading of "Moon River". By no normal measure was he a one-hit wonder.
But the streaming era rewards seasonal music in a way that reshapes his numbers entirely. "It's the Most Wonderful Time of the Year", his exuberant 1963 holiday standard, now returns every December to rack up enormous, concentrated plays, and it has pulled far ahead of everything else he recorded. It sits near 1.2 billion streams.
His other classics, including "Moon River", remain known but trail well behind on streams. Dividing the Christmas hit by his second biggest track gives a ratio of about 5.7, over our 5.0 line.
So by our strict, numbers-only measure, Andy Williams registers as a certified one-hit wonder, in the particular way Christmas artists tend to. He had a long and varied career, but the annual surge of one festive standard, amplified by streaming, now stands far ahead of a lifetime of other work.