Anastacia, Josh Groban, Andrea Bocelli, Sarah Brightman, Donny Osmond and Jason Donovan will be appearing in a special musicals medley which Andrew Lloyd Webber has put together for Concert for Diana at Wembley Stadium on 1st July.

Also appearing in the special performance will be Lee Mead, winner of the BBC's television show Any Dream Will Do. The choir for this specially devised segment is from the young people's theatre group, Chicken Shed Theatre Company.

Also announced today was the addition to the bill of Fergie from Black Eyed Peas and the release of a further batch of 5,000 tickets, which will go on sale from 9am Friday 15th June. Tickets, all priced at £45, are available from Ticketmaster on 0844 725 0107 and via the Concert for Diana website, www.concertfordiana.com. 5,000 restricted view tickets are also available at the reduced price of £27.50. These can be obtained only by calling 0844 725 0107.

The artists announced today will join Elton John, Duran Duran, Bryan Ferry, Rod Stewart, Joss Stone, Lily Allen, Kanye West, Nelly Furtado, P.Diddy, Natasha Bedingfield, Tom Jones, Will Young, The Feeling, James Morrison, Orson, Status Quo, Pharrell Williams, Roger Hodgson and Take That. The star-studded bill reflects both Diana's and Prince William and Prince Harry's favourites.

Also performing at the Concert for Diana will be leading UK session musicians forming the house band, led by musical director and acclaimed Paul McCartney sidesman Wix Wickens. The following musicians are in the house band:

Wix Wickens - MD, Keyboards

Ian Thomas - Drums

Trevor Barry - Bass

Jody Linscott - Percussion

Dominic Miller - Guitar

John Parricelli - Guitar

Pete Murray - Keyboards

Claudia Fontaine - Backing Vocals

Beverlei Brown - Backing Vocals

Margo Buchanan - Backing Vocals

Steve Sidwell - Trumpet

Chris White - Sax

Jamie Talbot - Sax

In recognition of Diana's love of ballet, the concert will also include a performance by the English National Ballet, accompanied by the English National Ballet Orchestra.

The concert has been devised by William and Harry as a celebration of their mother's life, and will be broadcast live to millions of viewers in over 140 countries around the world.

When they announced the concert last December, William and Harry explained that, 10 years on from their mother's death, they wanted to celebrate her life and commemorate her achievements. In addition to a Memorial Service on 31st August, the concert marks what would have been Diana's 46th birthday.

Tickets are available from Ticketmaster on 0844 725 0107 and via the Concert for Diana website at www.concertfordiana.com.