LONDON, ENGLAND - JUNE 04:  Musician Sir Paul McCartney performs on stage during the Diamond Jubilee concert at Buckingham Palace on June 4, 2012 in London, England. For only the second time in its history the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne. Thousands of well-wishers from around the world have flocked to London to witness the spectacle of the weekend’s celebrations.  (Photo by Dan Kitwood/Getty Images)