NEW YORK, NY - AUGUST 01: Christina Perri (C) and her band attend "Late Show With David Letterman" at the Ed Sullivan Theater on August 1, 2011 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - AUGUST 01: Christina Perri (C) and her band attend "Late Show With David Letterman" at the Ed Sullivan Theater on August 1, 2011 in New York City. (Photo by Taylor Hill/FilmMagic)