Listen to your average unknown random song and tell me where the people who sing it came from. Thats what I mean by no accent. It doesn’t exist in language, but it VERY MUCH exists in music. A-accent is the default for singing.

Hip hop I question that, but rap i could see because I’ve heard rap in other languages and being spoken poetry that does pick up a bit, but it isn’t characteristic of the music, and you still usually cant tell unless you understand the specific language.. so id give that as a maybe at best.