LONDON - JULY 25:  Queen Elizabeth II's Vladimir Tiara is displayed at Buckingham Palace on July 25, 2006 in London. Celebrating the Queen's 80th birthday, the largest ever exhibition of 80 gowns and jewellery from the 1940's to the present day, worn by her majesty on private and official engagements, will go on show to the public in the State Rooms during the summer opening of the palace.  (Photo by Peter Macdiarmid/Getty Images)