DIMI MINT ABBA
my pick for the best female voice in all Islam.

She has a record called
Music of Mauritania that is just amazing.

Additionally, start cultivating your own falsetto voice and start practising some typical middleeastern scales. You'd be surprised how much you can learn quickly.

Frankly, I come from the school that says you should be able to play or sing as well as the samples that you use..........I know that's harsh but I just think there is so much sampled music out there that is not very sophisticated.
These artists spent years learning to do what they do and it seems a little odd to just borrow there experience, especially without knowing much about what they do.

Additionally, learning some of these ways of singing and the scales from the culture mean that you can really appreciate the difference between really good singers and not so good ones, so it helps your enjoyment of the music in general.

There are good online resources for learning middleeastern scales and many can actually be played on western tuned isntruments.

It's all in the embellishments, though..........those quarter tone trills are actually not really difficult to learn............you just have to practise.