LONDON -- Sir Elton John said he is "jazzed up" about playing for Queen Elizabeth II at The Diamond Jubilee Concert because the monarch has always been a part of his life.

"I remember watching the coronation on TV," he said. "She's been queen almost as long as I've been alive. She's been a constant, and I think she's done an amazing job under difficult circumstances, sometimes, so I'm more jazzed about doing this than ever ... for her."

Sir Elton, who is still recovering after being rushed to the hospital last week with pneumonia, is just one of the superstar lineup thrilled to be invited to perform Monday night at the Buckingham Palace gig, which is part of the celebrations marking the monarch's 60 years on the throne.

Sir Tom Jones also is touched to be involved, saying that "when I had my [British honor the] OBE and knighthood, the queen pinned it on, so it's like, wow, you cannot get any better than that."

The queen and her son Prince Charles will make an appearance on stage at the concert alongside rock and pop royalty during the three-hour musical extravaganza, which has been masterminded by Take That singer Gary Barlow.

The Queen Victoria memorial stage will have an audience of 10,000 people who received tickets through a ballot, with a further 500,000 watching on big screens in nearby parks and roads, with millions more viewing at home. Royal guests will include the Duke and Duchess of Cambridge, Prince Harry and Charles' wife, Camilla.

In addition to Sir Elton and Sir Tom, the lineup includes a wealth of artists who have spanned the queen's reign, such as Sir Paul McCartney, Dame Shirley Bassey, Stevie Wonder, Kylie Minogue, Annie Lennox and Madness.

Barlow, who also is set to duet with Cheryl Cole, will perform his official Diamond Jubilee song, "Sing!" The single, written by Barlow and theater composer Lord Lloyd Webber, features singers from around the world, the wives of British service members and Prince Harry playing the tambourine.

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