A day after a gilded coronation ceremony watched by millions, King Charles III and Queen Camilla let others take the center stage on Sunday as they took in a star-studded concert featuring Katy Perry, Lionel Richie and others at Windsor Castle.

The newly crowned monarch and his wife appeared to enjoy the show as Richie performed “All Night Long,” at one point getting up on their feet and swaying to the music. Other members of the royal family, including 8-year-old Princess Charlotte and Prince George, 9, waved Union flags along with the crowd.