The `One That Got Away` singer - who recently split from husband Russell Brand - will appear in new PC game, `The Sims 3 Showtime`, which will be released in March.
Fans will be able to play as Katy in their games and obtain KatyPerry-themed goodies in the latest offering from the strategic life-simulation video game.
Katy - who will also front the global advertising campaign - said: "I love how you`re able to play out different stories through your Sims characters - giving them different careers and watching them succeed. It`s cool to see the Sims` stage performances in `The Sims 3 Showtime` decked out just like my `California Dreams Tour` - even my cotton candy video screens are in there! I always like to think of myself as a cartoon, and now I`m a Sim!"
Katy will work closely with The Sims Studio to create accessories, clothing, hairstyles, furniture and props so players can get to be the real Katy.