Katy Perry performing Birthday at Liverpool Echo Arena, 21st May 2014.<br>Gemma on stage with Katy for her 21st birthday in the birthday chair, Liverpool Echo Arena May 21st 2014! So thankful for Katy and her team for this! especially .<br>Katy Perry plays Firework live at Liverpool Echo Arena on the Prismatic World Tour on 21st May 2014. Filmed with a Panasonic FZ150.<br>Katy Perry plays It Takes Two live at Liverpool Echo Arena on the Prismatic World Tour on 21st May 2014. Filmed with a Panasonic FZ150.
