Well, it's not that new. The lowly t-shirt graduated from underwear to outwear in the '50s when Marlon Brando, James Dean and others began wearing their "underwear" outside their clothes...right there on television for everyone to see. Shocking!

Back then, t-shirts were just plain comfortable, which is why men started ditching the button downs and running around in their undershirts. But now they've become wearable billboards that broadcast our social & political ideals, the movies and TV shows we watch, the bands and brands we love, and, of course, our sense of humor.

Now the days of buying 3-packs of cheap plain undershirts to wear as outerwear are gone, too. Today's t-shirts are tie-dyed, screen-printed, colorful expressions of our individuality. The more unique they are, the more we love our tees.

Luckily, there is one thing about t-shirts that hasn't changed much: the more you buy, the more you save.