I don't think her voice is particularly unique, I think Moz was probably just using her fame. It's a shame it didn't work out but if they used another similar type of singer I don't think people will care.
Yes, it is a shame it didn’t work. Though it’s been more interesting than if he worked with some ‘cool’ alternative singer, one that was acceptable to his fans. Defying expectations, most likely could have been one of the reasons he said yes to her request to sing on it. I see it as a loss.