Britain's Queen Elizabeth II is seen on the balcony of Buckingham Palace with her grand son, Prince William, Duke of Cambridge, following the Carriage Procession from Westminster Hall in London, Britain, June 5, 2012.

Britain's Queen Elizabeth II, center, accompanied by Prince Charles and the Duchess if Cornwall, left, Prince William, and Kate, Duchess of Cambridge and Prince Harry, appear on the balcony of Buckingham Palace in central London, June 5, 2012, to conclude the four-day Diamond Jubilee celebrations to mark the 60th anniversary of the Queen's accession to the throne.

Britain's Queen Elizabeth , left, and Camilla Duchess of Cornwall pass along The Mall as part of a four-day Diamond Jubilee celebration to mark the 60th anniversary of Elizabeth II accession to the throne, London, June, 5, 2012.

Kate Duchess of Cambridge waves as she passes along The Mall as part of a four-day Diamond Jubilee celebration to mark the 60th anniversary of Queen Elizabeth II accession to the throne, London, June, 5, 2012.

Britain's Catherine, Duchess of Cambridge, and Prince William ride in a State Landau coach during a carriage procession from Westminster Hall to Buckingham Palace after attending a national service of thanksgiving to celebrate the Queen's Diamond Jubilee in London, June 5, 2012.

Britain's Queen Elizabeth II holds a bouquet of flowers as she returns to Buckingham Palace after attending a National Service of Thanksgiving and a Lunch in honor of the diamond jubilee in London, June 5, 2012.

Royal Air force Red Arrow display team fly pass Buckingham Palace in London where Britain Queen Elizabeth II watches from the palace balcony as part of a four-day Diamond Jubilee celebration to mark the 60th anniversary of Queen Elizabeth II accession to the throne, June 5, 2012.

Britain's Queen Elizabeth II, Prince Charles and Camilla Duchess of Cornwall, travel in a carriage through Trafalgar Square, London on route to Buckingham Palace during the Diamond Jubilee celebrations, June 5, 2012.

Britain's Queen Elizabeth II leaves Saint Paul's Cathedral with Dean of St Paul's David Ison after a national service of thanksgiving for the Queen's Diamond Jubilee at in London, June 5, 2012.

Members of the public await the arrival of Queen Elizabeth II on the Mall, June 5, 2012 in London, England.

Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the service of thanksgiving to mark the Queen's Diamond Jubilee at St Paul's cathedral, June 5, 2012 in London, England.

Queen Elizabeth II departs St Paul's Cathedral after a service of thanksgiving with the Dean of St Paul's David Ison, June 5, 2012 in London, England.

Britain's Queen Elizabeth II and members of the Royal Family leave St Paul's Cathedral in London, following a service of thanksgiving, June 5, 2012, during the Queen's diamond jubilee.

A rainbow is seen over London Eye and the stage of the The Diamond Jubilee Concert outside Buckingham Palace in London, June 4, 2012.

Major General Nick Eeles, Governor of Edinburgh Castle and General Officer Commanding Scotland, lights the Diamond Jubilee beacon at Edinburgh Castle beside Mons Meg Cannon in Edinburgh, June 4, 2012.

Fireworks for the Queen's Diamond Jubilee are shown, June 4, 2012.

Prince Charles kisses the hand of The Queen as she is joined on stage with the rest of the Royal family as well as performers at the Queen's Jubilee Concert in front of Buckingham Palace, London, June 4, 2012.

Queen Elizabeth II, second right, meets Will.i.am, second left, backstage at the Diamond Jubilee Concert outside Buckingham Palace in London Monday, June 4, 2012.

Sir Elton John performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, June 4, 2012.

Sir Paul McCartney performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, June 4, 2012.

Australian singer Kylie Minogue performs during the Queen's Diamond Jubilee Concert at Buckingham Palace in London, June 4, 2012.

Singer, actress and model Grace Jones performs during the Queen's Diamond Jubilee Concert at Buckingham Palace in London, June 4, 2012.

Will.I.am performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, June 4, 2012. The concert is a part of four days of celebrations to mark the 60-year reign of Britain's Queen Elizabeth II.

Singer Robbie Williams performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, June 4, 2012.

The Duke and Duchess of Cambridge with Prince Harry, right, attend the Diamond Jubilee concert in London, June 4, 2012.

Fireworks explode over Tower Bridge during the Thames Diamond Jubilee Pageant on the River Thames in London on June 3 2012, where 1,000 vessels of all shapes and sizes will be part of the Diamond Jubilee river Pageant. Britain is celebrating the diamond jubilee of Queen Elizabeth II, marking 60 years on the throne during which she has set a number of landmarks.

Britain's Princesses Beatrice, right, and Eugenie wave from a barge in a flotilla of 1,000 vessels, on the River Thames, during a river pageant to celebrate Britain's Queen Elizabeth II's Diamond Jubilee in London, June 3, 2012.

Prince Andrew, Duke of York, left, and Prince Edward, Earl of Wessex pose together on the deck of the boat 'Havengore' as it passes a large picture of the British royal family during the Thames Diamond Jubilee Pageant on the River Thames in London, June 3, 2012.

Family members of British expatriates living in New Delhi take rides on Rupa, a rented elephant, during an event as British expatriates gather to celebrate Queen Elizabeth II Diamond Jubilee anniversary at the British High Commission, June 3, 2012 in New Delhi, India.

Children of British expatriates stand in front of a huge old photograph of Queen Elizabeth' early visit to India during an event to commemorate her Diamond Jubilee celebration at the British High Commission, in New Delhi, India , June 3, 2012.

A general view of the Diamond Jubilee Thames River Pageant on June 3, 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.

Crowds gather at Tower Bridge on the banks of the River Thames to view the spectacle of the Thames Diamond Jubilee Pageant in London on June 3, 2012. Queen Elizabeth II was to sail on a ceremonial barge down the Thames on Sunday at the centre of a 1,000-boat pageant to mark her diamond jubilee, although heavy rain threatened to spoil the party.

Britain's Queen Elizabeth II (CL) stands amid members of the royal family (L-R) Prince Charles, Prince of Wales, Prince Philip, Duke of Edinburgh, Camilla, Duchess of Cornwall, Catherine, Duchess of Cambridge, Prince William and Prince Harry on the royal barge 'Spirit of Chartwell' during the Thames Diamond Jubilee Pageant on the River Thames in London on June 3, 2012.

The Royal Barge after passing under Lambert Bridge during the Thames Diamond Jubilee River Pageant in London, Sunday, June 3, 2012. More than 1,000 boats were to sail down the Thames on Sunday in a flotilla tribute to Queen Elizabeth II's 60 years on the throne that organizers are calling the biggest gathering on the river for 350 years.

Britain's Queen Elizabeth II, centre, and Prince Philip, right, arrive at Chelsea Pier in London, before boarding the royal barge to participate in the Diamond Jubilee River Pageant Sunday June 3, 2012.

Police horses on The Mall bedecked with Union Flags following a dress rehearsal of the royal carriage procession from Westminster Hall to Buckingham Palace prior to the Diamond Jubilee celebrations this weekend on June 1, 2012 in London, England.

HMS Diamond enters Portsmouth Harbour, southern England after firing a 21 gun salute to officially launch celebrations to mark the Queen's Diamond Jubilee this weekend, Friday June 1, 2012.

Racegoers cheer on an open-top bus during Investec Ladies' Day of the Investec Derby Festival at Epsom Racecourse in Epson, southern England, Friday, June 1, 2012. Queen Elizabeth II kicks off a long weekend of celebrations of her 60-year reign by going to the races, and perhaps no other event will give her so much pleasure.

Adam, six and Lucy Fergusson, seven, dressed as the Queen Elizabeth II and Prince Philip during a parade through Chichester, England as part of the celebrations to mark Queen Elizabeth II's Diamond Jubilee Saturday June 2, 2012.

Soldiers from 103rd Regiment Royal Artillery fire a Royal Salute for the Diamond Jubilee celebrations in the Museum Gardens at York, England, Saturday June 2, 2012.

Two-year-old 'knight' Vinnie Walters, bottom right, sleeps through a cacophony of vuvuzela noise created by his fellow knights of St George's Church during a parade through Chichester, England as part of the celebrations to mark Queen Elizabeth II's Diamond Jubilee.

A young 'knight' on horseback from St George's Church joins the parade through the town of Chichester, England, as part of the celebrations to mark Queen Elizabeth II's Diamond Jubilee celebrations, Saturday June 2, 2012.

Britain's Queen Elizabeth II and Prince Philip arrive for the Epsom Derby at Epsom race course, southern England at the start of four-day Diamond Jubilee celebrations.

Racegoers photograph the arrival of Britain's Queen Elizabeth II on Derby Day, the second day of the Epsom Derby horse racing festival, at Epsom in Surrey, southern England, on June 2, 2012 the first official day of Britain's Queen Elizabeth II's Diamond Jubilee celebrations.

Tom Queally (centre) riding Wrotham Heath on his way to winning The Diamond Jubilee Stakes during the Investec Derby, at the start of the weekend marking the Queen's Diamond Jubilee celebrations, at Epsom Racecourse on June 2, 2012 in Epsom, England.