Katy Perry's craziest outfits

We’re willing to bet that Katy Perry would love a dress up party.

We're willing to bet that Katy Perry would love a dress up party. From a geek to a geisha, from a California Gurl with blue hair to a 3D smurfette with blue skin, our October cover girl always goes all out to put together a memorable red-carpet look. Take a look at a few of our favourite Katy moments.