Help! Who is this new female singer I'm thinking of?!

She's a black, young, thin, woman with a kind of messy afro!. I think she's a new artist and in the music video there are shots of poor african children and in the chorus she kind of shouts vowels e-e-e-e-e i-i-i- a-, something like that, but it's not stupid, it has a really original sound to it!.
Any thoughts!?Www@Enter-QA@Com

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