NEW YORK, NY - MARCH 24: (EXCLUSIVE COVERAGE) Madonna signs the Facebook wall before her livestream interview with Jimmy Fallon at the Facebook offices on March 24, 2012 in New York City. (Photo by Dimitrios Kambouris/Getty Images)
NEW YORK, NY - MARCH 24: (EXCLUSIVE COVERAGE) Madonna signs the Facebook wall before her livestream interview with Jimmy Fallon at the Facebook offices on March 24, 2012 in New York City. (Photo by Dimitrios Kambouris/Getty Images)