Katy Perry Shows Off Her Christmas SpiritKaty Perry showed off her Christmas spirit at the Y100 Jingle Ball concert in Florida on Saturday night, wearing a sexy Mrs. Claus outfit. But it wasn't her first Christmas costume of the season -- she dressed as a sexy toy soldier during the Z100 Jingle Ball in New York City on Friday and as a snowman at KIIS FM's Jingle Ball earlier in December.

Before hitting the stage on Saturday, Perry tweeted, "Hello Miami!!! Now THIS is my kinda winter... Ready to JINGLE TONIGHT!?!?!"