I'm not going to quote everyone. That would take all day
But no, he's not really an international megastar, not in the States at least. The few people I know who had heard of him knew Grace Kelly, and that was about it. He just hasn't been here enough to get a substantial fanbase. It kind of stinks for the fans he has here, but I don't resent the fact that he goes where the support (and $$$). Heck, I'd probably do the same thing. And lets face it, the US and UK get plenty of famous artists coming through and the rest of the world gets zilch a lot of the time. In a way, it's nice to see the rest of the world have some fun, too
If he wants to have some fun in French, he's welcome to it as far as I'm concerned. It's maybe not his finest work ever, but I don't need every song to be a perfectly crafted Mona Lisa of a song. There have been quite a few doodles on napkins that I enjoyed more than any million dollar painting. Let the boy have his fun