The award for best holiday attire at KIIS-FM's annual Jingle Ball goes to Katy Perry [ tickets ], who was dressed in a sexy, metallic-red Santa's helper outfit--and for some reason decided to make her entrance by crawling out of a giant yellow banana.

Saturday's (12/6) event, hosted by Ryan Seacrest, among others, also featured artists such as Chris Brown [ tickets ], Jesse McCartney [ tickets ], David Banner [ tickets ], Pussycat Dolls [ tickets ], Estelle, Menudo [ tickets ], and Tokio Hotel [ tickets ]. The emphasis was on variety, with each performer playing a 15-minute set.