Ellen DeGeneres and Britney Spears
Michael Rozman/Warner Bros
12/08/2008 AT 06:40 PM EST
usually wears slinky, barely-there costumes for her performances. But for her latest gig – Christmas caroling with Ellen DeGeneres
– the singer donned a bonnet and gloves.
Plus, Spears and DeGeneres show off their dance moves as they get into the holiday spirit on The Ellen DeGeneres Show
set to air Tuesday, Dec. 16.