The royal family were also joined by Kate's parents, Carole and Michael Middleton, and her brother, James Middleton, and his wife for the holiday event.
The British pop star delivered hits like “Love Me Like You Do” and “Outside” in a skin-tight mesh-and-sequin number before DJ duo Adriatique hit the decks.
Other A-listers in attendance included Pusha T, Khalid, Rich Paul, Black Coffee, Loren Ridinger, Art Basel CEO Noah Horowitz and Airbnb CEO Brian Chesky.
On Saturday, the "Fireworks" singer took to the social media platform to share a carousel of intimate photos and videos of her trip to Tokyo with the politician.