Crikey. The last time a pop star was this mad Kelly Clarkson was breathing for the first time. In new video for ‘Part of Me’ candyfloss queen Katy gets revenge on a cheating ex by joining the army, smashing in heads, and shooting guns. Whatever happened to a night out with your mates at the karaoke? ‘Part of Me’ is taken from the rerelease of Katy’s Teenage Dream album and it’s an absolute corker. Watch the video below.