Windows Phone says you’re on Santa’s nice list
The party is canceled and Santa being the good manager he is reports to the elves that more toys are needed. The elves get the update on their Windows Phones and rejoice in having more work heaped on them. Unfortunately, we could not find any Naughty or Nice app in the Windows Phone Store, but we are certain that you are all on the nice list.
source: Microsoft (Windows Phone YouTube channel)