I went to a great talk last night featuring the illustrator Noma Bar. His work was absolutely brilliant and throughly inspiring.
Deservedly, he is very successful in the industry and his work has been featured in The Guardian, BBC, Random House, The Observer, The Economist & Wallpaper, amoungst others.
He uses negative space in the form of a related object to create faces (in the Maggie Thatcher portrait he uses the Tory logo, in the Soporanos, a gun, and so on).
Not only is it very clever but despite his incrediably simple style, you can tell immediately who each face is. Brilliant.
