This is a video demonstration of a digital mirror (camera and LCD display) that subtly changes your facial expression to make you appear happier than you really are. The hope is that by seeing yourself look happy, you will BECOME happy. But if you look like Beast from Beauty and the Beast I'd still recommend breaking all the mirrors in your castle.
Keep going for the video demo.
Thanks to Jennifer, who told me to turn my frown upside down and now I am SCOWLING.