9. Maybe even a nod to Katy's fellow JBB performer Lady Gaga? This image appears in the gallery:Katy Perry At The Jingle Bell Ball 2013: 13 Things To Expect 9. 9. Maybe even a nod to Katy's fellow JBB performer Lady Gaga? 13 images See the full gallery: Katy Perry At The Jingle Bell Ball 2013: 13 Things To Expect