How Did Performance Art Get Into Pop Music?

In the past several decades, performance art—or at least the evocation of “performance art”—has somewhat unexpectedly wormed its way into popular music. The union began, perhaps, in the nineteen-sixties and seventies, with Yoko Ono and John Lennon’s bed-ins for peace, and reached a sort of apex with Lady Gaga arriving at the 2011 Grammy Awards inside a giant egg.