Britain's Catherine, Duchess of Cambridge (R) and Camilla, Duchess of Cornwall (C) join Queen Elizabeth for the Diamond Jubilee River Pageant on the River Thames, in London June 3, 2012. Britain's Queen Elizabeth joined an armada of 1,000 boats in a gilded royal barge, in a pageant down the River Thames on Sunday in a spectacular highlight of four days of nationwide celebrations to mark her Diamond Jubilee. [Photo/Agencies]