You can see the ID and find that I'm the same person as >>545. I'm Japanese who likes to browse the English sites.
Koreans also sometimes put English in their songs, but I've never see Chinese do that.
Songs with English lyrics are so stylish, but they are totaly for Japanese only and not for foreiners who listen to Japanese music.
I'm not sure what makes Japanese be fond of English in their songs, but we like them. They are cool.
Ah... an idea came to me that Japanese fit together with Japanese traditional music called Gagaku, but music today is
imported from Western world so not match for Japanese.
Lastly, Japanese is NOT goot at English as you think. They made best efforts to make some english lirics, and they didn't try to toss the words ramdomly.