I found a lovely set of life-like renditions of Disney princesses. They're by Jirka Väätäinen, a graphic designer/artist. He takes pictures of models and alters the photography adding other design elements to create his final products.
Check out all his other work by following the link on his name. He's done most of the popular princesses and some other female Disney characters as well. When you go to his site, be sure to click "previous entries" at the bottom, because he's got a bunch of great artwork!