The queen, Royal family members, The Prince of Wales, The Duchess of Cornwall, The Duke of York, The Duke of Cambridge, Prince Harry and Meghan Markle arrived at the ceremony for Elizabeth - the world's longest living reigning monarch.
At another concert held during the summit, the Queen couldn't hide her resting bitch face when a singer almost fell off the stage at Buckingham Palace.
THIS morning the band of the Irish Guards played Happy Birthday during the changing of the Guard for the Her Majesty the Queen's 92nd "real" birthday.
Prince Harry led tributes to his grandmother in his new role as president of The Queen's Commonwealth Trust.
The concert also included a performance by pop singer Kylie Minogue and a banjo group led by Ed Balls, Frank Skinner, and Harry Hill, to which the Queen was seen nodding along.
She became queen in 1952 at the age of 25, meaning she has now reigned for more than 66 years. Because of this announcement, Prince Charles will likely represent the queen in an honorary capacity at future commonwealth gatherings.
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She later joined Prince Charles on stage for the show's climax and was presented with a gift by a boy named Mason from west London, who was also celebrating his birthday.
Next month, her grandson, Prince Harry, and Meghan Markle will Wednesday at Windsor Castle.
She broke out into a smile as Charles encouraged the crowd to give her three "unbelievably rousing cheers".
As is customary with monarch's birthdays, soldiers from the King's Troop Royal Horse Artillery and the Honourable Artillery Company fired gun salutes in London's Hyde Park and the Tower of London earlier on Saturday.
The Queen normally celebrates two birthdays a year-her actual birthday on April 21, and a second official birthday, usually falling on the second Saturday in June, which includes a Trooping the Color military parade in central London.