Members of the Honourable Artillery Company fire a 62-gun salute across the River Thames to mark the 92nd birthday of Britain's Queen Elizabeth, at the Tower of London, Britain April 21, 2018.

Britain's Prince Harry and Meghan Markle attend a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Jamie Cullum performs during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Britain's Queen Elizabeth shakes hands with a boy during a special concert "The Queen's Birthday Party" to celebrate her 92nd birthday at the Royal Albert Hall in London, Britain April 21, 2018.

A picture of Queen Elizabeth II is seen at Convent Place during her 92nd birthday, in the British overseas territory of Gibraltar, historically claimed by Spain, April 21, 2018.

Shawn Mendes performs during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Shawn Mendes performs during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Performers are seen on stage during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Figurines depicting Britain's Queen Elizabeth II are displayed for sale in a souvenir shop, during the day of her 92nd birthday, in Ronda, southern Spain, April 21, 2018.

Members of the Royal Gibraltar Regiment fire a 21-gun salute, to mark the 92nd birthday of Britain's Queen Elizabeth II, in front of the Rock, in the British overseas territory of Gibraltar, historically claimed by Spain, April 21, 2018.

Kylie Minogue performs during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Shaggy performs during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Britain's Queen Elizabeth waves to the audience during a special concert "The Queen's Birthday Party" to celebrate her 92nd birthday at the Royal Albert Hall in London, Britain April 21, 2018.

Members of the Royal Gibraltar Regiment march after firing a 21-gun salute to mark the 92nd birthday of Britain's Queen Elizabeth II, in front of the Rock, in the British overseas territory of Gibraltar, historically claimed by Spain, April 21, 2018.

Sir Tom Jones performs during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Singer Craig David performs during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Queen Elizabeth II is presented with flowers by a young boy on stage during a special concert "The Queen's Birthday Party" to celebrate her 92nd birthday at the Royal Albert Hall in London, Britain April 21, 2018.

Members of the Royal Gibraltar Regiment prepare to fire a 21-gun salute, to mark the 92nd birthday of Britain's Queen Elizabeth II, in front of the Rock, in the British overseas territory of Gibraltar, historically claimed by Spain, April 21, 2018.

Britain's Queen Elizabeth, surrounded by members of the royal family, waves during a special concert "The Queen's Birthday Party" to celebrate her 92nd birthday at the Royal Albert Hall in London, Britain April 21, 2018.

21 cartridges of artillery shells are seen after members of the Royal Gibraltar Regiment fired a 21-gun salute, to mark the 92nd birthday of Britain's Queen Elizabeth II, in front of the Rock, in the British overseas territory of Gibraltar, historically claimed by Spain, April 21, 2018.

Britain's Prince Harry speaks during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Britain's Prince Charles speaks during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Medals are seen on the coat of a member of the Royal Gibraltar Regiment, during the 21-gun salute, to mark the 92nd birthday of Britain's Queen Elizabeth II, in the British overseas territory of Gibraltar, historically claimed by Spain, April 21, 2018.

Britain's Queen Elizabeth waves next to Prince Charles and PrinceEWilliam, Duke of Cambridge, during a special concert "The Queen's Birthday Party" to celebrate her 92nd birthday at the Royal Albert Hall in London, Britain April 21, 2018. Reuters/Andrew Parsons

Performers are seen on stage during a special concert "The Queen's Birthday Party" to celebrate the 92nd birthday of Britain's Queen Elizabeth at the Royal Albert Hall in London, Britain April 21, 2018.

Britain's Queen Elizabeth smiles on stage during a special concert "The Queen's Birthday Party" to celebrate her 92nd birthday at the Royal Albert Hall in London, Britain April 21, 2018.