Britain's Queen Elizabeth II arrives at the Royal Albert Hall in London to attend a concert to celebrate her 92nd birthday, Saturday April 21, 2018. (John Stillwell/Pool via AP)
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LONDON (AP) - The audience at Royal Albert Hall got a rare treat Saturday - the chance to sing "Happy Birthday" to the longest reigning monarch in British history.
Queen Elizabeth II, with her eldest son Prince Charles at her side, waved to the crowd as they celebrated her 92nd birthday in song.
Charles got an enthusiastic response when he introduced her as: "Your majesty, mummy."
The queen took center stage after a varied pop concert featuring British singers Sting, Tom Jones and Jamie Cullum along with Australian star Kylie Minogue, long a fan favorite here.
Shaggy and Craig David also performed, and the festivities took a long stroll down memory lane, with audio from a speech Elizabeth made on her 21st birthday and video from her Golden Jubilee, when roughly 1 million people gathered outside Buckingham Palace to honor her.
She was flanked in the royal box by Charles, heir to the throne, and Prince William, next in the line of succession.
Prince Harry and fiancee Meghan Markle also attended, generating a roar of applause when they took their seats. The couple will wed May 19 at Windsor Castle.
Prince William's wife Kate, the Duchess of Cambridge, did not attend. She is expecting the couple's third child.
The queen's husband, Prince Philip, was also missing. He is recovering from hip replacement surgery.
The show featured contemporary tunes, but included songs from earlier eras, including selections from "My Fair Lady" - one of the queen's favorites - and a sentimental rendering of "Wonderful World."
Earlier in the day, honorary gun salutes were staged at Hyde Park, the Tower of London, a castle in Wales and the town of Windsor to mark the occasion.
The queen celebrates two birthdays every year: Her actual birthday on April 21, which she usually marks privately with her family, and her "official birthday" in the summer. That usually falls on the second Saturday in June, when she joins the Trooping the Color military parade in central London.
Elizabeth's real birthday this year came on the tails of the Commonwealth Heads of Government meeting, which brought the leaders of the 53 Commonwealth countries together in England.
The queen has led the disparate group, made up of Britain and its former colonies, since she took the throne in 1952.
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This story has been corrected to show that Saturday was the queen's actual birthday, not the "official" birthday she observes in June.
Britain's Queen Elizabeth II, surrounded by members of the royal family, takes her seat at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Queen Elizabeth II. (John Stillwell/Pool via AP)
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Britain's Queen Elizabeth II, surrounded by members of the royal family, takes her seat at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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FILE - In this Feb. 20, 2018 file photo, Britain's Queen Elizabeth II smiles during a visit to the Royal College of Physicians, in London. Queen Elizabeth II is marking her 92nd birthday with a concert in London featuring British singers such as Sting, Tom Jones and Jamie Cullum on Saturday, April 21, 2018. (Chris Jackson/PA via AP, File)
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In this Ministry of Defence photo dated Saturday 21, 2018, the Band and Corps of Drums of The Royal Welsh march inside the grounds of Cardiff Castle, Wales, to celebrate Queen Elizabeth II's 92nd birthday. (Corporal Tom Evans (RLC)/Minstrey of Defence via AP)
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Britain's Queen Elizabeth II speaks during the formal opening of the Commonwealth Heads of Government Meeting in the ballroom at Buckingham Palace in London, Thursday April 19, 2018. (Dominic Lipinski/Pool via AP)
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In this Ministry of Defence photo dated Saturday 21, 2018, army reservists from C Troop 211 Battery, which forms part of 104 Regiment Royal Artillery, fire a 21-gun salute inside the grounds of Cardiff Castle, Wales, to celebrate Queen Elizabeth II's 92nd birthday. (Corporal Tom Evans (RLC)/Minstry of Defence via AP)
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Britain's Queen Elizabeth II speaks during the formal opening of the Commonwealth Heads of Government Meeting in the ballroom at Buckingham Palace in London, Thursday April 19, 2018. (Yui Mok/Pool via AP)
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In this Ministry of Defence photo dated Saturday 21, 2018, soldiers from the 4th Regiment Royal Artillery fire a 21-gun salute in York, north England, to celebrate Queen Elizabeth II's 92nd birthday. (Corporal Darren Legg (RLC)/Ministry of Defence via AP)
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In this Ministry of Defence photo dated Saturday April 21, 2018, army reservists from C Troop 211 Battery, which forms part of 104 Regiment Royal Artillery, fires a 21-gun salute inside the grounds of Cardiff Castle to celebrate Queen Elizabeth II's 92nd birthday. (Corporal Tom Evans (RLC)/Ministry of Defence via AP)
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Tom Jones performs at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (John Stillwell/Pool via AP)
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Sting and Shaggy perform at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (John Stillwell/Pool via AP)
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Kylie Minogue performs at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Shaggy performs at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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From left, Ed Balls, Frank Skinner and Harry Hill perform at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Sting and Shaggy perform at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Shawn Mendes performs at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Shawn Mendes performs at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Craig David performs at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Prince Harry, right, greets Donel Mangena on stage at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Sting and Shaggy perform at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. Andrew Parsons/Pool via AP)
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Queen Elizabeth II waves to the crowd at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate her 92nd birthday. (Andrew Parsons/Pool via AP)
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Prince Harry speaks on stage at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (Andrew Parsons/Pool via AP)
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Ladysmith Black Mambazo performs at the Royal Albert Hall in London on Saturday April 21, 2018, for a concert to celebrate the 92nd birthday of Britain's Queen Elizabeth II. (John Stillwell/Pool via AP)
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