Blair Waldorf, in her obsessively perfect preppy-meets-sexy outfits, may have single-handedly resurrected the craze for headbands.
Her plunging necklines and high heels destroyed the "frumpy housewife" stereotype.
Summer's brand of relaxed California-cool was easily as much of a draw as her adorable on-screen love, Seth.
The quirky style, the oversize dresses, and of course, the wild hats—it was all just endlessly endearing.
Joan, in her curve-hugging outfits, is the definition of a bombshell.
In bright minis and with perfectly coiffed hair, Buffy (far left) managed to dispatch a seemingly endless army of demons while looking impossibly put together.
Her spot-on '60s ensembles were always topped off by loosely curled hair and a perfectly applied swipe of eyeliner.
Lucy always stole the screen—whether in an iconic '50s housedress (complete with apron and pearls) or one of her many wacky costumes (remember Carmen Miranda?).
The epitome of over-the-top '80s fashion. There wasn't a wild pattern, color, or outfit that the show's resident style maven Lisa Turtle couldn't rock.
The costume designers on this show sparked a trend at least as big as any runway designers: The tailored suits, swing coats, elegant coifs, and all-around general crispness are perfection.
Blake Lively's uptown-girl wardrobe is sleek and sophisticated, with slim denim, knee-high boots, and tons of layers.
Her classic, swingy, just-a-bit-sexy-but-still-utterly-professional look has stood the test of time. We like to think that if Michael Kors had been designing back then, her closet would have been filled with his pieces.
With outfits that ranged from gorgeously glamorous to undeniably wacky, she took chances, mixed aesthetics, and celebrated fashion like no one else, before or since.
Sexy California style—from their endlessly layered hair to their tan-emphasizing, skin-revealing, body-celebrating outfits.
The only way '90s grunge ever made it onto network TV: Claire Danes' drugstore-dyed red hair, Dr. Martens, pilled sweaters, and wildly appealing angst.
The only TV or movie "fashion editor" who really, truly gets the look right.
Lisa Bonet managed to pull together all the mismatched prints, vivid colors, and oversize separates of the '80s and still come out looking fantastic.
Kate Walsh's character has a chic, West Coast style—graphic prints, formfitting dresses, bold accessories, punches of color—she always looks sexily crisp.
Between her pin-straight, long-and-glossy hair, and her skinny sweaters with leg-lengthening bell-bottoms, Susan Dey's '70s style perfectly balanced innocence and all-out hotness.
Calista Flockhart's short skirts and sky-high strappy heels made lawyering (previously infamous for its singular unsexiness) look surprisingly hot.
The poufy/flippy bob, the Courrèges-mod outfits, the lipstick, the flats, and the major eyelashes added up to Marlo Thomas' kicky signature look.