A beautiful adornment can change your entire mien, take you from tired to raring to go, and make you feel like the most glamorous woman in the room. Which is why, when the holiday season rolls around, I take every opportunity to wear pretty, sparkly hair accessories. You can get cute pins and headbands for just a few bucks, and they lift your mood instantly. To help you start a crystal-encrusted arsenal of your own, I've collected 25 of the prettiest hair baubles out there — some that are too inexpensive to resist, and others that are strictly fantasy. Click through and make the shiny yours.