This is the big trend this year, maybe bigger than last year. Apparently, upside-down Christmas trees are popping up, er, down all over. You can either mount your tree to the ceiling or buy an artificial tree that's designed to stand upside-down. Like this one at website Treetopia.
Want to know how to install your tree upside down? Youtuber Msdreamcakes lets you know in this instructional video: