LONDON (AP) — A day after a gilded coronation ceremony watched by tens of millions, King Charles III and Queen Camilla had a way more stress-free time Sunday as they took in a live performance that includes Katy Perry, Lionel Richie and others at Windsor Castle.

Charles and Camilla appeared to benefit from the present as Richie carried out “All Night Long,” at one level getting up on their toes and swaying alongside to the music.

Other members of the royal household, together with 8-year-old Princess Charlotte and Prince George, 9, waved Union flags together with a crowd of some 20,000 gathered on the fort’s east terrace.

Charlotte and her mom, Kate, the Princess of Wales, sang alongside as Perry, wearing a gold foil ball robe, carried out “Roar.”

“Top Gun” star Tom Cruise appeared in a pre-recorded video message, saying: “Pilot to pilot. Your Majesty, you can be my wingman any time.”

Other stars performing on the live performance included British boy band Take That, Nicole Scherzinger from the Pussycat Dolls, and opera star Andrea Bocelli.

Even Miss Piggy and Kermit the Frog made an look, joking with host Hugh Bonneville.

Concertgoers sang “God Save The King” as landmarks across the United Kingdom, have been lit up in vibrant lights.

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