Katy Perry has launched her own version of the popular Tap Tap Revenge mobile game.
The app, which is available for the iPhone and iPad, allows users to play along to the singer's hits, including recent single 'California Gurls'.
There is also a VIP chat room where users can interact with each other.
Perry is the latest in a long line of stars, including Coldplay and Lady Gaga, who have released custom versions of Tap Tap Revenge.
It is available to download now via the iTunes music store.
Meanwhile, Perry is scheduled to release her new album 'Teenage Dream' on August 30.
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