From right, Britain's Prince Charles, Sir Paul McCartney, Camilla, Duchess of Cornwall, and Britain's Queen Elizabeth II, are joined on stage by performers at the conclusion of the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Sir Cliff Richard, centre, performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Sir Cliff Richard, fourth from right, performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Sir Paul McCartney performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Sir Paul McCartney performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Sir Andrew Lloyd Webber and Gary Barlow onstage at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
The crowd perform a Mexican wave outside Buckingham Palace at the Diamond Jubilee concert in London Monday June 4, 2012. Thousands of flag-waving fans gathered to watch British music royalty celebrate Queen Elizabeth II on Monday with a Buckingham Palace concert featuring acts from throughout her 60-year-reign. But the queen's husband, Prince Philip, missed the concert after being hospitalized with a bladder infection. (AP Photo / Anthony Devlin, Pool)
Cheryl Cole and Gary Barlow perform at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo / David Parker, Pool)
In this photo released by MPL Communications , Sir Paul McCartney with Gary Barlow backstage at the Diamond Jubilee concert at Buckingham Palace in London Monday June 4, 2012. (AP Photo / MJ Kim, MPL Communications) NO SALES
In this photo released by MPL Communications , Sir Paul McCartney is at the sound check for the Diamond Jubilee concert at Buckingham Palace in London Monday June 4, 2012. (AP Photo / MJ Kim, MPL Communications) NO SALES
Kylie Minogue performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Stevie Wonder performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Sir Elton John performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Elton John performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo / David Parker, pool)
Sir Tom Jones performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Rolf Harris performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Robbie Williams performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Alfie Boe performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
An image of Queen Elizabeth II and Duke of Edinburgh is projected onto Buckingham Palace during the Diamond Jubilee Concert in London Monday, June 4 , 2012. (AP Photo/PA, Dave Thompson)
Spectators watch fireworks, which brought to a close the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
A beacon is lit outside Buckingham Palace marks the end of the Jubilee concert, a part of the Diamond Jubilee celebrations in London Monday June 4, 2012. Thousands of flag-waving fans gathered to watch British music royalty celebrate Queen Elizabeth II on Monday with a Buckingham Palace concert featuring acts from throughout her 60-year-reign. But the queen's husband, Prince Philip, missed the concert after being hospitalized with a bladder infection. (AP Photo / Anthony Devlin, Pool)
Dame Shirley Bassey performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Britain's Queen Elizabeth II, and Sir Tom Jones, back, onstage at the conclusion of the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Jessie J performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
JLS perform at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Queen Elizabeth II meets Sir Elton John backstage at The Diamond Jubilee Concert in London Monday June 4, 2012. Thousands of flag-waving fans gathered to watch British music royalty celebrate Queen Elizabeth II on Monday with a Buckingham Palace concert featuring acts from throughout her 60-year-reign. But the queen's husband, Prince Philip, missed the concert after being hospitalized with a bladder infection. (AP Photo / Dave Thompson, Pool)
Sir Paul McCartney performs at the Queen's Jubilee Concert in front of Buckingham Palace, London, Monday, 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. (AP Photo/Joel Ryan)
Queen Elizabeth II meets Ed Sheeran, left, as Kylie Minogue, right, looks on backstage at The Diamond Jubilee Concert in London Monday, June 4, 2012. Thousands of flag-waving fans gathered to watch British music royalty celebrate Queen Elizabeth II on Monday with a Buckingham Palace concert featuring acts from throughout her 60-year-reign. But the joy was tempered by news that the queen's husband, Prince Philip, was hospitalized with a bladder infection. (AP Photo/Dave Thompson, Pool)