The singer was in the middle of her 2013 hit “Roar” when the flying butterfly she was sitting on tilted precariously Katy Perry is the latest touring pop star to be hit with a major prop malfunction while mid-song — and mid-air. Multiple fan videos from Perry’s performance in San Francisco showed the singer nearly falling from a flying butterfly as it traversed the Chase Center. Perry was singing her 2013 hit “Roar” Friday night when the prop appeared to tilt and drop, which prompted her to