Watch: The Sims 3 trailer starring Katy Perry

Katy Perry expands her Candyfornian empire in the launch trailer for Katy Perry's Sweet Treats, an add-on for computer game The Sims 3.

Katy Perry expands her Candyfornian empire in the launch trailer for Katy Perry's Sweet Treats, an add-on for computer game The Sims 3.

There are food-themed fashions aplenty -- for female Sims, that is -- plus furniture designs for living quarters and public spaces, from the Bonbon Lawn Park and Patty's Natural Baths to the Cake Pleasure Dome.

It's the second Sims 3 add-on to feature KP, after she endorsed a special Collector's Edition of the Showtime pack.

After musicians Pixie Lott and Nelly Furtado as well as teen solo-sailor Michael Perham were brought on board for the game's first expansion, World Adventures, Perry's relationship with The Sims 3 has proven to be more consistent.

It's a partnership that some long-term Simmers have raised concerns over, instead requesting equivalents to The Sims 2's University and Seasons expansions, and pointing out that total newcomers attracted by Perry's presence would need to buy both the base game as well as the new Sweet Treats pack.