For God's sake, you are comparing an amateur, incomplete singer with the likes of Whitney Houston and Sarah Brightman, and yet you manage to have a straight face?
And to be exact, you are comparing what Sarah Brightman and Whitney Houston are NOW, with someone who did not have the extensive (and expensive) coaching of the aforementioned two?
Sarah Brightman was married to Andrew Lloyd Webber, and the "Christine" role for the Phantom of the Opera was written EXCLUSIVELY for her voice! Imagine the training and the experience she had! I also would sound better if I was Andrew Lloyd Webber's wife for many years, and I am a 37 year old MAN!!!
http://en.wikipedia.org/wiki/Sarah_Brightman#Music_and_voice And what if your cousin was Dionne Warwick and your godmother was THE Aretha Franklin? And you are talented? Would you become a shoe salesman? No, you would become Whitney.
http://en.wikipedia.org/wiki/Whitney_Houston