Madonna Performs Elliott Smith's 'Between The Bars' At MoMA

Performance art is to celebrities what YouTube videos are to adorable cat owners -- neither parties are forced to partake in their respective activities, yet countless insist upon doing so. Tilda Swinton, Jay-Z, Lady Gaga and a slew of other famous names have dipped their toes in the art world waters recently, hosting ambiguous "performances" at meccas like the Museum of Modern Art and Pace Gallery in New York City. And now, as if to say "Hello, I've been doing this my whole career," Madonna has...