Check out Viva Navidad in DCA -- very fun!
Not really "shows," but make sure to catch the neon lighting on Rte. 66 in Cars Land (at dusk every day -- check Google for the time for sunset on your chosen day, then be on Rte. 66 about 10 minutes beforehand to find a nice viewing spot near Flo's -- get ready to watch the magic!), the castle lighting (time on the entertainment schedule), and the IASW lighting (times on the entertainment schedule).