Taylor Swift, Jon Bon Jovi and Prince William Sing “Livin on a Prayer” – VIDEO 11/27/2013 mj santilli American Idol 15 Watch Jon Bon Jovi, Taylor Swift and Prince William sing “Living on a Prayer.” No, I’m not kidding! It happened at the Winter Whites Gala at Kensington Palace. Taylor led the prince on to the stage, to join Jon in the epic singalong. The prince is a pretty good harmonizer! Whoda thunk it? VIA TV Guide