Also people can sing in different styles and sound totally different if she was trying to disguise her voice that could be her for sure. It isn't hard to use different mannerisms and it would make her a smarter artist if you think about it.
It sounds real. I think she uses major auto tune for all of her demos that we never hear. To disguise her voice and the lyrics and whatnot. But lyrics she has posted were in there, pretty sure it's a major rough draft. That being said I really dig the sound. Really good hook.