I can't get my voice to sound good....Am I just a bad singer or am I doing something wrong?

I can't figure this out. This is me singing Think of Me from Phantom
of the Opera. Is this just not my song? Am I messing something up? Or
am I really just a bad singer?

http://www.flickr.com/photos/56266445@N03/5864621602/in/photostream

PS I know I kind of miss a couple notes, anyone know how to build up
my control?