Brazilian street art legends Os Gemeos are rocking their first solo exhibition in America, mounted at the ICA Boston. The show is all about the surreal characters and color bursts we associate with twins Otavio and Gustavo Pandolfo. To say it is the biggest street art show of the summer would be a magnificent understatement, so naturally we're inclined to think the exhibition poster is the street art collectible of the summer. 

Just $24.95 from ICA Store, the poster reproduces Os Gemeos' "Back In The Days, 2008" and adds relevant exhibition dates.