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This is the spectacular stage for the Queen's Diamond Jubilee Concert in June.
Sir Paul McCartney, Sir Tom Jones and Dame Shirley Bassey are among the acts that will be performing at the show outside Buckingham Palace on 4 June.
The former Beatle, who performed at the party in Buckingham Palace for the Golden Jubilee in 2002, said he was a "big fan of the Queen".
He said: "I think she's great and I think she does a great job and people say 'Ugh, the monarchy and all that' but what are you going to get in return?
"You'll get, like, David Cameron. I mean, much as we may love him, I'm not sure I want him to represent the whole of Britain. Anyway, so if I get asked, I could easily do it."