^ Well they're kinda forced to sing in English, if they want to get out of the Arabic countries, as there's no chance for them to be known in the local markets. That's why I'm not going to post only Arabic speaking bands, as "arabic music" is not only made by the language.
Btw, here's a documentary a watched a few days ago, about a band trying to make it out of Iraq, if you're interested:
IMDB link to the movie