I have seen her work all over the internet but rarely with credit appropriately given. Take a look at Kumi Yamashita.
Frequently I come across the work of artists like Kumi Yamashita on sites like Tumblr with no credit appropriately given to the artist. Before finding her official site I thought that this was the work of several different artists. It is mind blowing in its simplicity and absolutely breath taking in its complexity. Please, if you are not already familiar with her work, take a moment and visit her website. Below are some of my favorites among her impressive portfolio (And even more impressive resume).
The first photos here are completely made out of strategically place nails and one piece of string.