Watch: Katy Perry pole dances onstage at the GRAMMYs...dressed as a witch!

Katy Perry took to the stage at the 56th Annual Grammy Awards, dressed as a twerking, pole dancing witch! Watch her sexy performance above.

The dark costume was an extreme change from the 29-year-old's demure white tulle dress she wore earlier in the night.

Check out her red carpet outfit in the gallery below…