If you were born in 1918, congratulations. According to the Pew Research Center, you're one of about only 100,000 centenarians in the United States and fewer than 573,000 worldwide. If you've lived that long, you've seen some big changes in fashion along the way. Some have come, gone, and come back again. Others were regrettable fads that thankfully stayed dead once they went out of vogue. Others caught on quickly and never went out of style.

100 Memorable Fashion Trends That Shaped a Century

Some fashion trends are the result of war, others are the brainchildren of bold, innovative designers. Some are born out of necessity, some are triggered by a single celebrity's taste, and others arrive by accident. No matter the reason, fashion both steers and reflects the climate and culture of the time. Here are 100 of the most memorable trends over the past century.

LOOK: Popular fashion trends from the year you were born

Leg warmers, pillbox hats, and overalls are a few of the most memorable fashion trends over the last 100 years. Take a trip down memory lane and explore these trends. 

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