London, May 15 (ANI): Veteran singer Sir Elton John has been revealed as the surprise performer at the upcoming concert for Nelson Mandelas 90 th birthday.

The whole event is being set up by Mandela’s 46664 campaign against Aids team, and one of the reasons John did not want his participation to be known, was because he did not want it to clash with his own Aids Foundation charity.

Elton is a British legend and we are thrilled to have him join an already exceptional line-up, The Sun quoted an insider as saying.

He didnt want to be mentioned on the press release or on any announcements as he wanted to be a total surprise.

He also doesnt want to his priorities to clash with his own Aids Foundation charity.

We dont know why hes being so silly as of course it wont. Elton will pop up on stage at some point during the day and sing a few songs. He will then duet with a younger artist.

This hasnt been confirmed yet however we believe it will be Duffy or Eminem.

Its going to be brilliant. Nelson has no idea Elton is going to be there, the insider added.

Those taking part in the concert at Hyde Park besides Sir Elton John are Amy Winehouse, Queen, Bono, Razorlight, Keane, Sugababes And Jamelia.

Princes William and Harry, ex-US president Bill Clinton and wife Hillary and Robert De Niro are all expected to be in the crowd.

Tickets start from 65 pounds and are available from Ticketmaster.com now. (ANI)