Concluding the series of images of this years Christmas tree, here is an image of the royal sisters at the top (safe for Derpy at the very top ;)) of the tree. Lacking color nouances, I had to give Celestia one darker blue tone in her mane and tale than she would have in the series, but nevertheless I am quite happy with how both of them turned out.  
Apart from the individual images and a slightly alternative variant there are also two versions of this image in which I hadn’t removed a relief of Santa which I had also made for the tree. Funnily Santa seems to look a little confused about all the ponies (which was absolutely NOT intentional). Maybe he is looking for Rudolf.