London 2012 officials are keen to keep secret details of Sunday's Olympic closing ceremony, refusing to validate announcements from Muse and George Michael that they will take part. According to Muse, who performed the official track for the Olympics, NME magazine they would be involved. There's been rumors bandied about, particularly in the last 48 hours.
The ceremony, which begins at 2100 BST on Sunday, is likely to be watched by a capacity 80,000 crowd at the Olympic Stadium, with global TV viewers that could match the probable 900m who watched the opening of the Games. It will include a procession of the participating nations' flag bearers, followed by athletes appearing together rather than divided by nationality, symbolizing how the Games fetch the world together.