Paula Fernandes is one of Brazil's biggest sertanejo stars, and her place on this list is very much a case of measurement rather than judgement. She has a long, hugely successful career at home, with multiple platinum albums and a devoted national audience, which makes her global streaming profile all the more lopsided.
Her most-streamed track is a Portuguese-language duet version of "Highway Don't Care", the Tim McGraw, Taylor Swift, and Keith Urban song, recorded for international audiences. It reached far beyond her usual catalogue, lifted by that cross-border star power.
On streaming, that duet sits near 286 million plays, while her next most-streamed tracks trail at around 54 million. That puts the ratio above 5, over our line.
So by our strict, numbers-only measure, Paula Fernandes registers as a certified one-hit wonder, and we flag the caveat plainly. This is a major artist with a deep catalogue and enormous success in Brazil, whose own songs are well known to millions. It is only that one internationally flavoured duet drew a far wider global streaming audience, pulling just ahead of a body of work that is anything but the story of a single song.