Updated Nov 27, 2013 - 12:43 pm
Prince William, Bon Jovi sing karaoke with Taylor Swift
Taylor Swift and Jon Bon Jovi both attended the Centrepoint's Winter Whites Gala at the Kensington Palace in London on Tuesday.
The 51-year old rock star took the stage and performed for the 200 guests at the charity event.
But midway through his act, Swift and Prince William joined Jovi onstage for an impromptu performance of "Livin' On a Prayer."
One of the attendees managed to capture the rare moment on camera and posted it to YouTube.