Judges Katy Perry and Lionel Richie were both in the UK for their respective performances at the Coronation Concert. However, the pair didn't want to miss out on the action and joined the show via video link – and they weren't alone.
"We were trying to figure out what we could do to bring something different to the show... I have a surprise," Richie began, before moving to the side as the King and Queen walked into view.
"I just wanted to check how long you'll be using this room for?" Charles questioned the pair.
"Thank you so much for your brilliant performance," he continued, while Camilla nodded in agreement. Richie then went on to enquire about a party being thrown in the next room of the palace.
"You're throwing the party right next door," Richie said, adding: "As soon as we finish, we're coming to the party."
The pair then thanked the royal couple for their appearance before turning back to the camera with shocked expressions on their faces.
Richie and Perry played alongside Take That and Andrea Bocelli at the Coronation Concert, with the event having taken place at Windsor Castle. Alanis Morissette and Ed Sheeran subsequently filled in as guest judges on the US talent show while the pair were away.
Following their announcement in the line-up, both singers said they were honoured to be performing at the celebration.
"To share the stage with the other performers at the Coronation Concert is a once-in-a-lifetime event and it will be an honour and a celebration," Richie said of the occasion.
Perry said she was looking forward to raising awareness for The British Asian Trust, which she is an ambassador for.
"I am excited to be performing at the Coronation Concert, and helping to shine a further light on the British Asian Trust's Children's Protection Fund, whose work includes on-ground initiatives to fundraising, with the aim to find solutions to child trafficking," she said in a statement.
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