Jonathan Yeo is definitely a rather unusual artist. He has created potraits of Paris Hilton and George Bush using images from porn magazines.
The Paris Hilton porn collage is below. We don't have a close-up shot, but see if you can spot anything. This photo is being carried by newspapers and media worldwide, but no one seems to have realised Paris' thumb is simply an uncensored appendage!
Here's the President Bush collage, which gives a much better look at the components of the portrait -- especially the ear: