A7S is the recording name of the Swedish singer-songwriter Alexander Tidebrink, a behind-the-scenes hitmaker whose voice has powered some enormous dance records. He is best known as the featured vocalist on global smashes by other producers, which makes his own-name catalogue a borderline case here.
That catalogue gathers around one track. "Nirvana", released in 2021, is a melodic vocal-house song, and it became his most-streamed release under his own A7S billing.
On streaming, "Nirvana" sits near 44 million plays, while his next most-streamed solo track trails at around nine million. That puts the ratio just past 5, over our line.
So by our strict, numbers-only measure, A7S currently registers as a certified one-hit wonder under his own name, and we note the caveat clearly. As a featured vocalist he has been central to several huge dance hits credited to other artists. It is simply that, billed solo, one melodic-house track sits just far enough ahead of the rest. Given how often his voice anchors other producers' hits, it would be no surprise to see another solo single arrive and move him off this list entirely.