Katy Perry performs Hot n Cold at Z100 s Jingle Ball 2010 I was actually there (to the right of the stage, 4 rows up) and at the song she slips on the pile lolz but they try not to show it I have 3 more songs that she sang during Jingle Ball 2010 I will post the next one once I reach one of the following: 10, 000 views 500 likes 100 subs Happy Holidays