Katy Perry has said she felt like a natural doing the voice of Smurfette in the upcoming movie about the Smurfs - because she feels like a cartoon character in real life.
"The Smurfs movie was really fun for me cause a lot of times, you know, 360 days out of the year I feel like a cartoon. So I thought playing a cartoon was a natural thing to do," the singer said at the launch of her new perfume Purr, in Mexico City.
"With The Smurfs I get to walk into the studio and I can be in my pyjamas and I make a really cute little voice, which is kind of a mixture of my voice and a little voice," she said.
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.
Katy said she was excited about performing at the February 13 Grammy Awards, where she has been nominated for four awards, including album of the year for Teenage Dream.
"It's going to be an amazing performance. I don't want to get too much into it, but it's going to be a medley of Teenage Dream," she said, adding: "But there's going to be a lot of surprises here and there."
She's excited about her date, too.
"My grandma, who is 90 years old, is going to come with me. She's going to be my date on the red carpet, cause I figured if I don't win any Grammys I still get to go home with my granny," she said.