It is really true! When you feel good, like when you're simply in your comfortable clothes or you aced an exam or just having a good mood, you are absolutely going to look better! If so, don't miss the chance to take a picture of yourself wearing your bright smile. Just like what I did! I believe that it helps to remind me why I should always keep my mind positive everyday. You know, self-motivation.
So, if you want to look young and vibrant just like me, you should also start being optimistic, and the rest will follow.
Try it! Optional, but highly recommended ;)