Pretty much anything Blair wears in Gossip Girl would be acceptable, but this particular dress is appropriately demure yet still has enough detail to be enticing.
Looks kindof like cool, sparkly, wrapping paper. Perfect.
Blake Lively looking delightfully merry in her greyish-tanish-taupe frock. Only wearing a dress like this during Christmastime could inspire this much merriment.
And every lady needs a handbag for her personal items, why not have that handbag be adorned with a shiny gold sabertooth tiger?
(photos collected from Gossip Girl Insider, Refinery29, and frshconcepts)