LONDON- Marina Abramovic tells really funny dirty jokes. Maybe it’s because the self-proclaimed grandmother of performance art has made a career out of timing, but she tells her jokes—too racy to print—with great delivery and panache. This summer at London’s Serpentine Gallery, audiences will get a chance to interact—and just maybe share a joke—with the 67-year-old Belgrade-born, New York-based artist during her new performance “512 Hours.” The award-winning artist also recently worked with Jay Z for his ” Picasso Baby” video and taught Lady Gaga the Abramović Method, a series of exercises to heighten mental and physical awareness. Read more