BUCKINGHAM Palace was turned into Rocking'em Palace last night for an unprecedented royal pop extravaganza.

More than 12,000 lucky fans got tickets for the Jubilee concert in the Queen's garden which went ahead despite a fire at the palace on Sunday night.

And Scotland Yard said that an estimated one million people had gathered in Green Park, Hyde Park, St James' Park, Trafalgar Square, the Mall and around the palace to watch the show on giant screens.

The Party at the Palace kicked off with Queen guitarist Brian May playing the National Anthem from the roof.

Latino heart-throb Ricky Martin and Mis-teeq, followed by S Club 7 and Annie Lennox, then hit the stage.

Twenty-four members of the Royal Family were in the audience at the start, including Princes William and Harry, the Prince of Wales, the Duke of York, the Earl and Countess of Wessex, the Princess Royal and Commodore Timothy Laurence.

Hundreds of people surrounded the Royal Box as members of the Queen's family arrived at the concert - the loudest cheers reserved for the Prince of Wales and his sons.

Charles, looking tanned and relaxed, laughed loudly as comedian and compere Lenny Henry cracked a joke at his expense, much to the amusement of William and Harry.

The Prince of Wales's partner Camilla Parker Bowles, sat in the third row of the Royal Box, and led the clapping as Phil Collins and Queen drummer Roger Taylor took to the stage with a Motown tribute and a version of You Can't Hurry Love.

It was the second time during the Bank Holiday weekend that Camilla had been seen in public with the Royal Family and the first time with Charles, William and Harry.

The Queen arrived with 35 minutes of the show remaining.

With the Duke of Edinburgh she received a standing ovation, introduced by Dame Edna Everage, who called her the "Golden Jubilee girl".

There was a warm welcome from the crowd for Pop Idol winner Will Young as he sung a version of the Marvin Gaye classic I Heard It Through The Grapevine.

But it was Lenny Henry who brought the biggest smile to the Prince of Wales's face as he cracked a risque joke before introducing Welsh diva Dame Shirley Bassey.

Her version of the James Bond theme Goldfinger received a big round of applause from the Prince.

Earlier, the crowd had given an enthusiastic welcome to Prime Minister Tony Blair who was seen sharing a joke with his Chancellor Gordon Brown.

Other guests at the concert included Yoko Ono, the widow of murdered Beatle John Lennon, and Virgin boss Sir Richard Branson.

Topping the bill was ex-Beatle Sir Paul McCartney.

Other stars included Eric Clapton, Sir Elton John, Sir Cliff Richard, Dame Shirley Bassey, Atomic Kitten, Phil Collins, Blue, Emma Bunton, Tom Jones, Aretha Franklin, Joe Cocker, Steve Winwood, Rod Stewart, The Corrs and Beach Boy Brian Wilson.

Backstage, guitar legend Clapton told how it was an "honour" to pay tribute to his late pal George Harrison at the concert. Speaking before his performance he said he still got nervous before concerts.

But Ray Davies, front man for The Kinks, said he only agreed to play to get a member of his family into the concert.

"I don't normally play this kind of thing - this is much too showbiz," he said. "The reason I'm doing it is to get my 90-year-old auntie in."

After the show the Queen was due to light the final beacon in a chain stretching throughout the United Kingdom, the Channel Islands, each Commonwealth country and 14 other nations.

There would then be a spectacular 14-minute finale when one of the biggest firework displays ever seen in London was set off from the palace roof.

Many of the thousands of individual fireworks have been custom made for the Queen in China