The popstar will take part in an extensive and exclusive relationship with EA, helping to develop multiple games and virtual goods in the franchise.
Forthcoming expansion The Sims 3: Showtime will offer a special 'Katy Perry Collector's Edition', featuring the Ultimate Stage bonus venue, themed stage props and an exclusive poster.
Perry will continue to work closely with developer The Sims Studio to create clothing, hairstyles, accessories, furniture and other content for future games.
"I love how you're able to play out different stories through your Sims characters - giving them different careers and watching them succeed," said Perry.
"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!"
EA's executive for music Steve Schnur added: "Today marks the start of the most integrated and exciting collaboration with any artist in the history of The Sims.
"We couldn't be more excited to work with Katy and bring her distinctive talents, style and personality to the franchise's global fan base. No performer could better represent the humour and fun of the Sims brand."
Katy Perry previously worked with Ubisoft to promote Just Dance 3 on her UK 'California Dreams' tour.
The Sims 3: Showtime will be released this March on PC and Mac.
> The Sims 3: Showtime new images released - picture gallery
> Read on-going showbiz coverage of Katy Perry
View images of The Sims 3: Showtime 'Katy Perry Collector's Edition' below: