Why do people who have accents while speaking, seem to lose them while singing?

Question

Specifically, when singing in English, their speaking voice is accented, and their singing voice isn’t… As an example, I came across an Irish Youtuber named CallMeKevin, and he recently posted a cover of NIN’s “Hurt”. His voice is lovely, and he often sings snippets of songs while streaming, but as soon as he starts singing, his accent seems to drop off. I’ve noticed this for other artists, too. Can anyone tell me why this happens? Or is it just my perception?

In:

Answer 1

I’m sure it’s not always the case but money. You’re much more likely to go big in the US if you don’t sound different