The once-in-a-lifetime sing-along took place at the Winter Whites Gala fundraiser for Centrepoint charity on Tuesday night, where Jon received a special award for his humanitarian work.
According to the Daily Mail, Jon invited William onstage to sing “Livin’ on a Prayer,” but the Prince would only agree to it if Taylor joined him as well.
There is also a candid video of Taylor and William’s introduction. Watch!
In case you were wondering, Kate Middleton did not attend the event.
The must-see video of the day is definitely Taylor Swift, Prince William and Jon Bon Jovi singing karaoke at Kensington Palace. Who knew the future king could hold a tune?