Post pictures from these stages! (or if you look exactly the same, post pictures from many years apart)
I'm one of those people who changes their appearance COMPLETELY every few years. There was a girl I knew in middle school who had no idea who I was when meeting me again two years later. Just recently, I ran into someone I wound up going on a trip with but haven't seen in two years, and she didn't recognize me until I poked her.
When I was about 14:
When I was about 16 (so scowly!):
For some reason, the differences for me really amuse me. Makes me feel like a secret agent or something!