The pair had been due to perform at the famous London venue, but the show was axed after Bennett fell ill with flu. Gaga decided not to let her time in the British capital go to waste, so she headed to Soho jazz bar Ronnie Scott's and performed as a surprise addition to the night's bill.

Video footage posted online shows Gaga singing jazz songs at the small venue.

After the show, Gaga stepped left the club to find her Rolls-Royce, which had been sitting outside Ronnie Scott's during her performance, had been slapped with a parking ticket.