Gwen Stefani and Gavin Rossdale went to the dark side ... at least where their wardrobe is concerned.

We love how Gavin's denim is fitting a bit tighter than his wife's pants. Then again, we like baggy sweats, too, Gwen!

The Bush frontman, who was also put on purse duty, left Barneys wearing a Canadian Tuxedo. You know, it's an ensemble that consists of a denim jacket and pants.

Good thing Gav's good looks help to pull off what could have been a denim disaster!