Personally, I doubt that Shepard Fairey has every done any kind of artwork which he hasn't stolen from somebody else.
I don't believe he has a creative bone in his body.
Since he did the Obama poster (which raised hundreds of thousands of dollars for Obama -- expect him to get either some gummint appointment or contracts) I've been paying attention to his stuff, and nowhere have I ever seen anything remotely resembling an original hand-done sketch or painting. Everything is a machine-reproduction of somebody else's creativity, with the colors and context and message changed.
He does steal from gifted photographers, painters, etc. -- so that eye-catching quality passes onto his posters. But without a photocopier, the man would be lost.
Since he did the Obama poster (which raised millions of dollars for Obama -- expect him to get either some gummint appointment or contracts)....