Check out this blog post:

http://gemssty.com/2008/11/22/age-10-to-60-through-make-up-photography/

It shows how one woman can be made to look everywhere from 10 to 60 years old, thanks only to makeup and lighting, with no Photoshopping whatsoever. I find it really interesting to see what talented people can do in camera, although I do consider Photoshopping as an art in and of itself.