The singer gave an electric rendition of her hit tracks Roar and Firework at the celebratory event held in the grounds of the castle.
Charles III and Queen Camilla are joined by their family and 20000 people for the musical extravaganza in the grounds of Windsor Castle.
Thousands of people travelled to Windsor to attend the concert, with the King and Queen sitting in the royal box to applaud the performers.
The Coronation Concert, beamed onto large screens across the country, saw the Prince of Wales make a speech honouring his father the King before ...
Katy Perry wowed crowds at Windsor Castle as one of the acts at King Charles' Coronation Concert on Sunday night.
Celebrations for the coronation of King Charles III ended Sunday with drone shows over Windsor Castle and a total of 10 UK cities.