Perry said the role felt natural because she feels like a cartoon character in real life.
The Grammy-nominated pop star will also take on a more grown-up acting role as a guest star on an episode of the CBS comedy hit "How I Met Your Mother."
The songstress also said she's thinking about heading to Mexico in August as part of her world tour and might even try a song in Spanish.
She said half of her Twitter messages are from Spanish-speaking fans and she wants to learn the language.
The Associated Press contributed to this report.