All the accent gets magically sent to British rappers

It's true. Singing pretty much proves they're faking it.

I heard an interview with Mick Jagger where he said that he sounded American singing and English talking because he learned to sing by emulating American singers and picked up their pronunciation.

Because singing is basically its own accent.

but American singers also tend to sound more British, because they often sing without rhoticity, i.e. without pronouncing R's that follow vowels, and are not followed by another vowel, e.g. pronouncing "larger" like "laja"

Interestingly enough, when you're talking classical singing, it's the American accent that disappears.

🎶 Never moind I'll foind...🎶

Idk, all the British bands and solo artists I like definitely sound British. Maybe this only applies in pop music?

https://youtu.be/KwIe_sjKeAY

I've read it's because singing and speaking are handled by different parts of the brain. Accents are regional, inside your head as well.

Imagine singing in Brummie