I love holiday ads. Maybe even more than Superbowl ads, but don't tell anyone that.
First of all, the Saks Fifth Avenue building ad in NY is amazing. It's a 3-D projection on the building using video mapping.
Quite different but hilarious (in my opinion) none the less, is the Target 2-Day Sale TV spot. A lot of people think it's annoying but I think the lady they casted is such a perfect fit and too funny. Below is a link to the montage.