In Asian music, there are a lot of singers that will sing (or try to) in another language to broaden their audiences. One example is the artist BoA
She's really special in that she's native Korean and is more or less (as far as I can tell) fluent in Japanese and sings in both languages successfully with big htis. Recently she released her new CD in Taiwan and to my utter surprise...she has two remakes of her songs in Mandarin. Um. She's a great singer and the melody is there. And her Mandarin isn't horrible but it's just so...ODD. Similarily when lots of Japanese artists sing in English. You can't tell that it's in English I swear.
So what do you guys think about these multi language singers? I'm using an Asian example because that's what I'm familiar with but what other artists have done this (Euro techno pop exculded I guess haha)? Is it worth their effort at all?