Looks like there is indeed a change of outfit for The Girls during the party night..
Zooey Deschanel for New Girl in Superbowl Promo
They’re just endless
HQ, Filming episode 3x18, January 23.
Zooey Deschanel and Jake Johnson
Zooey Deschanel was all yellow as she joined her on-screen boyfriend Jake Johnson and her New Girl co-stars Hannah Simone, Max Greenfield and Lamorne Morris to shoot a scene near Venice Beach, Calif. on Jan. 23, 2014.
If Zooey and Emily Deschanel ever swapped bodies this may be the result.