When she created it in 1920, Coco Chanel intended to give this scent to only 100 or so of her best clients. But by 1921, demand for it was so great she had to sell it in her shops and open it up to the public—and it's been a best-seller ever since.
no. 5 eau de parfrum spray, $74 for 1.2 oz., chanel.com
L'Oreal Elnett Hairspray
Since it wasn't available in the U.S. until 2008, hairstylists would smuggle this classic hairspray home in their luggage whenever they traveled internationally. It's that good.
"elnett" satin extra strong hold hair spray, $14.99, l'oreal, ulta.com
Benefit BeneTint Stain
The Benefit founders created it in 1977 for a dancer who didn't want her red pigment to fade between shows. Like the color, its popularity's been staying strong since then, too.
Clinique Dramatically Different Moisturizer
No SPF or CC or BB extras: just pure, simple moisturizer. It does one thing, and it does it well.
"dramatically different" moisturizing lotion, $25 for 4.2 oz, clinique, sephora.com
Elizabeth Arden Eight Hour Cream
Invented in 1930, this cream's still the single most popular common denominator in all the makeup artist kits we've seen. For moisturizing lips, for illuminating cheekbones, for priming skin for makeup, it's still the most versatile thing out there.
This one's only been around since 1992, so it's the youngest product in this list by far. But in that time, it's become the #1 most popular under-eye circle eraser ever. It works miracles. Small, subtle miracles.
touche eclat pen in luminous toffee, $40, yves saint laurent, sephora.com
Dove Beauty Bar
First introduced in 1957, these super-moisturizing bars have been the preferred shower soap for decades.
More than four decades ago, this super-expensive (yet super-effective) moisturizer was invented by a NASA scientist trying to treat his own chemical burns. So if it seems pretty genius, well, that's why.