system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do British accents disappear when singing?

I believe this happens with a lot of other accents too, but I'm curious why all of a sudden they sound like Americans when they sing.
gpt
Singing uses modified vowels and consonants. This will partially or even fully eliminate anyone's accent, including us Americans. It just happens that many of the modifications that singing does happen to be the similar to those that define many of the American accents. 

So it may sound similar to an American accent, but it is not. It is a singing accent.