2013 The Most Powerful Couples of 2013 How to get from Pope Francis to Lady Gaga in 11 easy steps By Andrew Katz Dec. 09, 2013 prev11 of 13next Dave J. Hogan / Centrepoint / Getty ImagesPRINCE WILLIAM met TAYLOR SWIFT, American singer, during a charity gala at Kensington Palace. William joined Swift and Bon Jovi onstage to sing “Livin’ on a Prayer.” Share Read Later