Good art exists in more places than just galleries. Street Art Utopia has a huge collection of the best street art of 2011, with over 106 different pictures documenting everything from Facebook cigarettes to Lego to 3D street art to your art on a wall.
I know some people don't respect street art as much as other art forms but there's few things that brighten my day more than randomly stumbling onto a hilarious piece of art on the street and wondering who, when and how it got there. Check out the best of street art in 2011 here. [Street Art Utopia via BoingBoing]