You're oversimplifying a complex situation to the point of adding nothing to the discussion.

Snapshots:

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Iggy helped to fuck up the image of a female rap artist.

I would have use Snow as an example of prior art, personally. That shit is so cash.

In Living Color had a great parody called "Imposter" featuring Jim Carrey.

Remember Matisyahu the Orthodox Jewish reggae singer?

It's literally the vocal version of Blackface, ie Blackvoice.

BLACKVOICE