Along with her husband and the thousands in attendance, the rider sang aloud one of Queen’s most famous songs, We Will Rock You, as the band performed alongside vocalist Adam Lambert.
Throughout the two-hour show, Zara was also seen beaming and waving a Union Jack as she kept pace with the performers on stage.
Before the concert began, Princess Anne’s daughter was spotted sharing a sweet moment with Princess Charlotte, as she helped the seven-year-old into her seat by pushing a large pillow away from her chair.
Mike and Zara arrived at Buckingham Palace after spending the afternoon in Surrey.
There they watched the Epsom Derby races alongside Zara’s mother, the Princess Royal, Sir Timothy Laurence and Peter Phillips.
Ahead of the pageants, Zara shared an update on the Queen’s health, which had raised concerns among royal fans after Buckingham Palace announced on Thursday evening that she would not be leaving her castle to attend the funeral service. thanksgiving in London the following day.
Speaking of Her Majesty, her granddaughter said she was “fine”.
Zara said: “She’ll be watching on TV – she’s got a few runners today scattered all over the country so she knows exactly what’s going on.
READ MORE: BBC blasted for showing Princess Charlotte ‘bored’ at concert
“She’ll just be sitting on the couch watching TV. She’ll be in her comfy clothes.”
When asked if she had spoken to Her Majesty recently, Zara added: “Yeah. She’s fine, but obviously she was in London on Thursday.
“She’s got runners today so she’ll focus on that and watch the Derby.”
DO NOT MISS
Zara shares a love of horses and horse racing with her mother and grandmother.
In 2012, she took part in the London Olympics – and won a silver medal in a team competition.
Zara and Mike were spotted at events every day of this special Jubilee Bank Holiday weekend.
On Thursday, they were among the members of the Firm to watch the Trooping the Color parade from the Major General’s office.
As they are not active cabinet members, they were not invited to the balcony of Buckingham Palace to watch the RAF flypast.
The following day, they were among thousands of people who attended the Platinum Jubilee Service of Thanksgiving held at St. Paul’s Cathedral.
Dressed in a stunning hot pink outfit, Zara arrived with her hubby on a bus they shared with several royal cousins and extended family members.