Actually, I think the cultural appropriation thing is OK. But there are a lot of other artists and critics who decry hip-hop artists like Iggy Azalea. Even though Miss Azalea is playing her own original music, and not borrowing someone else's characters, as the authors of "The Wiz" did.
Maybe she's just jealous of her looks?

Iggy Azalea
I know of Iggy Pop (who created his name from his first band, the Iguanas).
From where does she find an odd name like Iggy if not Mr. Pop/Stooge?
She is kind of cut, but I don’t like hip hop, no matter who’s doing it.