LONDON, UNITED KINGDOM - DECEMBER 19: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge attends a Christmas party for volunteers at The Mix youth service on December 19, 2016 in London, England. The Mix youth service works with Their Royal Highnesses' Heads Together Campaign. (Photo by Max Mumby/Indigo/Getty Images)
