it's really Mariah's voice on The Warning (proof)

[Him Shadow]

I'm sorry if this is somethin' that you all knew, I didn't, I always thought that it's some girl with similar voice, actually I remember when it came out and a lot of members here said it's not REALLY her voice so it stuck in my head and never thought about that again

proof: http://www.youtube.com/watch?v=8zs5MjrGtrw

[Eedee]

Glad I could do that for you

[Never_Enough]

Rare shit