There will also be big screens outside the Palace

The rest of the bill has yet to be announced, but the line-up is intended to reflect pop music throughout the 50 years of the Queen's reign.

The concert will be watched live by 14,000 people in Buckingham Palace Gardens, with big screens outside the Palace gates, and by millions more on BBC TV and radio.

"You just don't get that many invitations to sing for the Queen of England. I'm going to go the extra mile to be there," Franklin, 60, said.

The singer has often been dubbed the Queen of Soul, and has had hits including Respect, I Say A Little Prayer and Sisters Are Doin' It For Themselves.

The Queen will celebrate 50 years on the throne

She has won 15 Grammy Awards, was the first female performer inducted into the Rock and Roll Hall of Fame and her voice has been designated a natural resource by her adopted state of Michigan.

She has also had more million-selling singles than any other woman in pop history.

The concert will take place on 3 June - one day after the 50th anniversary of The Queen's coronation.

A classical concert will be held in Buckingham Palace's grounds on 1 June.

It will be the first time the Palace grounds, usually the venue for invitation-only Royal garden parties, are opened for public concerts.

Tickets will be free and issued through a ballot. Details of how to enter will be released early next year.