P.S. The '80s Are Back: Madonna and Sean Penn Reunite in NYC

Madonna threw a massive party to screen her short film Secret Project Revolution at the Gagosian Gallery in NYC on Tuesday night. Guests included Lindsay Lohan, Zachary Quinto, Anderson Cooper, and Madonna's collaborator on the project, photographer Steven Klein. The most notable attendee, however, may have been Madonna's former flame Sean Penn, who stepped straight out of the '80s to watch his ex-wife speak about the film before she hit the stage for a performance of Elliott Smith's "Behind the...