Queen elizabeth turns 90
Queen's wardrobe goes on display at Buckingham Palace exhibit
The Buckingham Palace exhibit is one of three such royal fashion displays taking place there.
The service was a double celebration for the queen with Prince Philip, her husband of 68 years.
The queen, who has been on the throne for 64 years, turned 90 in April.
Sunday's concert is the highlight of a four-day pageant which also includes equestrian.
In a rare move in recent years, she then drove through Windsor in an open-topped car with Prince Philip.
The world's oldest monarch turns 90 today & still performs hundreds of engagements a year.