While most people would be upset if a stranger turned up at their wedding, that wasn’t the case for one St. Louis couple, whose big day was crashed by none other than Katy Perry. Hayley Rosenblum and Blonie Dudney were celebrating their nuptials when Katy, dressed in a jumpsuit and baseball cap, decided to stop by. Katy, who had no connection to the couple, stuck around to pose for some pictures with the bride and groom and guests, and even got her groove on on the dance floor.