A project by Zefrey Throwell titled Ocularpation: Wall Street involved 50 participants, many were artists to be naked on 1 August 2011 at Wall Street itself. It made it in the news when 3 were arrested for the name of art. Check out its article by Hyperallergic here.
Photo above is by Nadja Frank, taken from the link.
Throwell himself is one creative brain with his mind-blowing works which you can view from his personal website here.