^ It's all a matter of taste.
I have Christina's first album, but it doesn't do it for me vocally.
I LOVE her vocals on Stripped. To me it's her best album vocally.
The best vocal singer in my opinion is Mariah on her first two albums.
Whitney and Céline share second place.
Whitney on her first album and Céline Dion on her "celine dion" and "the colour of my love" album.
I remember the slogan to break Céline into the European market: "Remember the name, the voice is unforgetable".