Katy Perry Performed Hits Like 'Unconditionally' And 'Firework' For The Set. This image appears in the gallery:Amazing Pictures From The 2013 Jingle Bell Ball Saturday Show 12. Katy Perry Performed Hits Like 'Unconditionally' And 'Firework' For The Set. Picture: Danny North 95 images See the full gallery: Amazing Pictures From The 2013 Jingle Bell Ball Saturday Show