Michael Jackson's memorial service is set to be the Greatest Show On Earth

Micheal Jackson's final video recording shows him finalising his act for London's O2 concert. The star looks on sizzling form - leaping across the stage as he performs his hit, They Don't Care About Us.

Photographer Kevin Mazur - who watched the final show said: "I watched in awe. From what I saw, Michael was back - and in real style. He was amazing, happy and energetic. He performed virtually non-stop for two hours and ran through about a dozen greatest hits. He stopped just a couple of times to tweak arrangements and work on moves with dancers.

"Every track he sang sounded terrific. I honestly could not wait to see the show." Kevin, 48, who has photographed Jacko since the '80s, said he was every bit as energetic as he had been nearly 30 years ago. The snapper added: "He was the same old Michael. At one point he got on a cherry-picker crane and was hoisted over the audience - it was an amazing sight."

Jackson's friend, Uri Geller, said tonight the footage raised a "big question" about what prompted the star's dramatic demise. "The question is: What happened from that point to the day that he died?" said Geller. "In the photographs I've seen, he looked in shape, he was smiling, he was happy. What happened? That's the big question."

Michael Jackson's memorial service is set to be the Greatest Show On Earth, just as the superstar had predicted. Up to a MILLION people are expected to make the pilgrimage to the Staples Center arena in Los Angeles on Tuesday - with 750 million more watching on TV. Jacko's family yesterday confirmed his send-off will feature performances and tributes from a galaxy of music legends.

Giant screens will be set up outside the vast 20,000-seater stadium - home of the Los Angeles Lakers basketball team - for mourners who cannot get in. President Barack Obama was last night believed to have been sent an invitation. Another is thought to have gone out to Sir Paul McCartney. Singer Diana Ross and screen legend Liz Taylor are among showbiz pals also expected to attend. But Quincy Jones - brains behind Jacko's biggest albums Thriller, Off The Wall and BAD - said he would NOT be there.