LONDON, ENGLAND - DECEMBER 06: Catherine, Duchess of Cambridge (L), Prince William, Duke of Cambridge (2nd,L), Camilla, Duchess of Cornwall (R) and Prince Charles, Prince of Wales (2nd,R) pose with British singer-songwriter Gary Barlow (C) ahead of a fund-raising concert in aid of The Prince's Trust at Royal Albert Hall on December 6, 2011 in London, England. (Photo by Ben Stansall/WPA Pool/Getty Images)