A Scandinavian singer (probably Nina Persson of The Cardigans) told once that she sings in English because the language of pop/rock is English, and it sounds funny/not alright in other languages.

I sure feel there is truth in that. Every language has a melody, and musical styles have to be 'fitted' to them to work together. German hip-hop doesn't sound like either US school, same for the French. I think AnNa R. had a great success building her singing style on German language.

_{*Lunatic*, n.
One whose delusions are out of fashion.}