7. Perhaps a dedication to her sexy-as-hell boyfriend John Mayer for one song?

This image appears in the gallery:
Katy Perry At The Jingle Bell Ball 2013: 13 Things To Expect

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 

10. 13 images

See the full gallery: Katy Perry At The Jingle Bell Ball 2013: 13 Things To Expect