These portraits are by Russian artist Olga Larionova. They are even move amazing when you know they are not photographs but done entirely in pencil. Wonderful attention to detail and mind boggling at the same time.
If you want to see more of Olga’s work, you can find it on Deviant Art here.
Since I first post this the links to the pictures I had linked here were removed from the source. So for know I recommend going to the above link which (at this time) is still active.
Or lets try this one for a while.