Madonna makes a surprise visit to school in Kent as favour to Mohamed Al Fayed

Madonna made a surprise visit to a school music festival, dropping in by helicopter.

The singer turned up as a favour to Harrods boss Mohamed Al Fayed who had organised the charity fundraiser at the New School in Sevenoaks, Kent, on Friday.

Madonna was introduced by the compere as the "biggest superstar in the world" - which elicited a frown from the singer, who then mouthed: "No I'm not."

Mr Al Fayed then failed to cajole Madonna into singing a duet with him.