Jingle Ball 2011: Stars Attend KIIS FM's Annual Concert (PHOTOS)
Ignore the weather and the calendar, it's officially the holiday season. How can we be so sure? Because December 3 was Jingle Ball!
From the outrageous Lady Gaga to the hair-whipping Willow Smith to Jennifer Love Hewitt, who donned a Christmas-red (and very low-cut) dress, Hollywood's biggest came out to celebrate KIIS FM's annual concert.
Take a look at the stars who were there to share in all that good cheer!