^ I don't know about big-name producers, but quite a load of her work is with American writers and such. I personally haven't heard of the producers before, but hey, they're American
Collaboration wise, she'd been contacted by De La Soul and Ak'sent among others to work with, and she got
the Lupe Fiasco on her Reflex album.
When I have the time, I'll compile a list of names ^^;