Before:
http://i.imgur.com/LAEAG.jpg
After:
http://imgur.com/1vT9u.jpg
Keep in mind this was rushed so it isnt perfect. Its just an example. I linked them so you can see the pics full size. Thats at 300% in photoshop.
Here is the finished version of the chick for the web gallery:
Keep in mind im a nerd and I enjoy spending long periods of time on photoshop lol.
I just felt someone should mention pixel by pixel. I used a 1, 2, 4, and i think 8 px soft brushes using clone stamp tool and zoomed in around 1000 - 1200+ %.