South Park fan art. This was displayed at the 2011 San Diego Comic-Con and the 2012 MacWorld Expo. South Park Studios still owns the original piece.
Here's a print of it, signed by Trey and Matt: http://i15.photobucket.com/albums/a368/AlbinoRapper/001.jpg
http://s15.photobucket.com/user/AlbinoRapper/media/002-1.jpg.html
http://i15.photobucket.com/albums/a368/AlbinoRapper/003-1.jpg
Prismacolor pencils and ink on watercolor paper, 2011.