Katy Perry's 'Part Of Me: The Movie' opened in 3D theaters over the weekend.  To honor this California Gurl (and to celebrate 'National Go Braless Day' ) we take you through some of Katy's wackiest bustier costumes!

Tell us which you liked best by taking our poll!

 

 

 

 

 

Katy Perry becomes a human Hershey Kiss!

 

 

 

 

 

 

 

 

 

 

 

 

Katy Perry's cupcakes for 'California Gurls' video

 

 

 

 

 

 

 

 

 

 

 

Katy celebrating her movie release which a movie reel bra!

 

 

 

 

 

 

 

 

 

 

 

Katy Perry opens up her 'California Dreams' concert tour with a new twist on peppermint candies!

 

 

 

 

 

 

 

 

 

 

 

 

Katy shoots sparks into the night with an electric bustier for her 'Firework' music video