But the former 'Jackson 5' member revealed many top artists were unavailable for the date due to prior commitments. "Numerous stars were just not able to change their schedules to make a live appearance at the Vienna event possible," the BBC quoted him as saying. He added: "Many artists and performers who I have spoken to personally told me that it would be a great honour to be part of this memorial concert for my late brother.
"However, due to the short time-frame it was not possible for many of them to change their schedule so that they could be on stage in Vienna on 26 September, therefore we decided, after careful consideration, to change the date of the tribute concert to June 2010 - just a few weeks before the first anniversary of his untimely death.
"Now we have eight months to put this monumental show together and not just eight weeks." Organisers World Tribute Productions promised a refund to all ticket holders for the Vienna concert. Spokeswoman Nina Elland also said: "We need time to confirm the location. We are definitely moving to London and Wembley Stadium is our favourite location."