This is a great tutorial in Photoshop. The artist starts with a high-res photo of Angelia and goes to town on it. It is very cool to watch. I was amazed by what he could do in such a short time. Would be a neat thing to do to your dog or mother in law!
If you find any others like this let me know!

Thanks!

Update: Looks like they do this a lot in youtube. Here is one for you Eliza Dushku fans!