Adam, who died in May 2007, age 64, from pneumonia, was the vocal coach for such London stars as Sarah Brightman, Elaine Paige and Barbara Dickson and coached Michael Crawford when Crawford won the title role in Andrew Lloyd Webber's The Phantom of the Opera.

Adam's last project was vocal coach to Helena Bonham Carter prior to the filming of "Sweeney Todd." Bonham Carter will introduce scenes from the film at the upcoming tribute.

Newcomers to the evening include brothers Andrew and Julian Lloyd Webber — who will perform two pieces, including "Pie Jesu" — and Rod Argent and Colin Blunstone, who will also perform together.

Among those also scheduled to be part of the I'd Like to Teach the World to Sing! tribute are Anthony Andrews, Robert Bathurst, Christopher Biggins, Isla Blair, Don Black, Peter Bowles, Lorraine Chase, Maurice Clarke, Richard Clifford, Tom Conti, Kara Conti, Martin Crewes, Lorna Dallas, Anton Du Beke, Elaine Delmar, Camilla Dallerup, Edward Fox, Peter French, Susan George, Hannah Gordon, Nickolas Grace, David Greer, Georgina Hale, Susan Hampshire, Anita Harris, Patricia Hodge, Sally Ann Howes, Gloria Hunniford, Jeremy Irons, Clive James, Fiona Kennedy, David Kernan, Peter Land, Bonnie Langford, Denis Lawson, Helen Lederer, Maureen Lipman, Gillian Lynne, Simon MacCorkindale, Siobhan McCarthy, Hilton McRae, Robert Meadmore, Sarah Miles, Jonathon Morris, Sir Roger Moore, Elaine Paige, Sian Philips, Jonathan Pryce, Jan Ravens, Liz Robertson, Greta Scaachi, Wayne Sleep, Gay Soper, David Soul, Terence Stamp, Una Stubbs, Ian Waite and Susannah York.

The evening — directed and choreographed by Gillian Lynne — will benefit the Royal Brompton Hospital's Ian Adam Memorial Fund. Peter French produces. In a statement producer-singer French said, "Ian was a remarkable man and a profound teacher. He had a unique gift of instilling great confidence into all his students and making you believe you could achieve anything your heart desired. In the same way, this gift will be passed on through the Singing for Breathing Fund at Royal Brompton Hospital. Through the skills being taught and the art of practice, patients will gain confidence, just as we did, to breathe more efficiently and in a way that benefits their recovery and so their overall health."

Her Majesty's Theatre is located in Haymarket, London. For tickets call 0844 412 4657 or visit www.seetickets.com.