Prince shares stage with Elton John

'Purple Rain' singer Prince was joined on stage at London's O2 arena by Elton John last night.

John walked onto the stage without an introduction to collaborate with the popstar on a rendition of The Beatles hit 'The Long And Winding Road'.

The 'Candle In The Wind' star sang on the cover version, while Prince, who is in the middle of his 21-day residency at the concert venue, played the guitar.

A reporter for the BBC who was at the gig, commented: "Sir Elton has performed on stage with many of the top stars of the past three decades, including Eminem and George Michael, but this was still a surprise -albeit one which was much appreciated by the crowd."

Following their duet, Prince told the audience: "You know who it is - Sir Elton John!"