Diamond Jubilee - Buckingham Palace Concert

(Photo credit should read LEON NEAL/AFP/GettyImages)

British singer Sir Paul McCartney performs on stage during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on June 4, 2012. The star-studded musical extravaganza comes on the third of four days of celebrations to celebrate Queen Elizabeth II's 60 years on the throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(LEON NEAL/AFP/GettyImages)

US singer-songwriter Stevie Wonder performs during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on June 4, 2012. The star-studded musical extravaganza comes on the third of four days of celebrations to celebrate Queen Elizabeth II's 60 years on the throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(LEON NEAL/AFP/GettyImages)

US singer-songwriter Stevie Wonder (R) and US singer-songwriter will.i.am (L) perform during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on June 4, 2012. The star-studded musical extravaganza comes on the third of four days of celebrations to celebrate Queen Elizabeth II's 60 years on the throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(LEON NEAL/AFP/GettyImages)

British singer Sir Paul McCartney (L) performs during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on Juine 4, 2012. The star-studded musical extravaganza comes on the third of four days of celebrations to celebrate Queen Elizabeth II's 60 years on the throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(LEON NEAL/AFP/GettyImages)

British singer Sir Paul McCartney performs during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on Juine 4, 2012. The star-studded musical extravaganza comes on the third of four days of celebrations to celebrate Queen Elizabeth II's 60 years on the throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(LEON NEAL/AFP/GettyImages)

British singer Sir Paul McCartney performs on stage during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on Juin 4, 2012. Britain's Queen Elizabeth II made a regal appearance at a star-studded diamond jubilee concert Monday but without her husband Prince Philip at her side after he was hospitalised hours earlier. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(LEON NEAL/AFP/GettyImages)

British singer-songwriter Elton John performs during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on June 4, 2012. The star-studded musical extravaganza comes on the third of four days of celebrations to celebrate Queen Elizabeth II's 60 years on the throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(LEON NEAL/AFP/GettyImages)

British singer-songwriter Elton John performs during the Queen's Diamond Jubilee Concert at Buckingham Palace in London on June 4, 2012. The star-studded musical extravaganza comes on the third of four days of celebrations to celebrate Queen Elizabeth II's 60 years on the throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/GettyImages)

Diamond Jubilee - Buckingham Palace Concert

(Photo by Dan Kitwood/Getty Images)

performs on stage during the Diamond Jubilee concert at Buckingham Palace on June 4, 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. Thousands of well-wishers from around the world have flocked to London to witness the spectacle of the weekendÂ’s celebrations.

Diamond Jubilee - Buckingham Palace Concert

(Photo by Dan Kitwood/Getty Images)

performs on stage during the Diamond Jubilee concert at Buckingham Palace on June 4, 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. Thousands of well-wishers from around the world have flocked to London to witness the spectacle of the weekendÂ’s celebrations.