The last time you wore a ribbon in your hair, you were likely sporting pigtails and braces. Ribbons don't have to evoke a grade-school vibe, though. Ribbons in velvety, ribbed, and silky varieties have even been spotted on recent runways, and with good reason. When done right, this unexpectedly chic accessory provides a simple way to dress up your hair for any holiday occasion. To get hair ribbon ideas that are the antithesis of juvenile, read on.