Cara Delevingne and St. Vincent pulled a fast one on the paparazzi in London on Friday night. As the two stepped out together for their evening, they greeted the unsuspecting photographers with a full water-gun assault. In the past couple months, we've been seeing more and more of the gorgeous couple, who are celebrating their first holiday season together [1]. Back in October, the two held hands during Paris Fashion Week [2], and earlier this week, they had a stylish outing in London [3]. Keep reading to see their latest wet adventure.