Here is Cher - with and without makeup. Other famous people too.
http://abcnews.go.com/Entertainment/slideshow/photos-celebrities-sans-make-4577149 (http://abcnews.go.com/Entertainment/slideshow/photos-celebrities-sans-make-4577149)
I think photography condition also plays a role in making such difference.
Barbie~~
I think she actually looks better without all the spidery eyelashes and sparkles.
A couple of shots looked better "sans", but most of 'em had me going "O.o whoa!"