Amazon has a secret hub of Internet-famous beauty products at up to 40% off

This hydrating facial cleanser is a favorite of dermatologists, celebrities, Amazon shoppers — just about anyone who uses it. It's gentle on sensitive skin, and it hydrates skin with hyaluronic acid and essential ceramides as you wash.

Bio-Oil is a product that celebs like Kristin Chenoweth, Halle Berry and Kate Middleton reportedly swear by. The powerful formula includes a blend of oils, including vitamin A, vitamin E, lavender, rosemary, chamomile and sunflower seed, that hydrate and soothe skin while boosting collagen production. This can lead to greater skin elasticity, reducing the look of scars, stretch marks and dark patches. Plus, you can use it anywhere on your body, from head to toe.

Greasy skin? Freshen up throughout the day without ruining your makeup using this mini face roller that absorbs excess oil. Just roll it around on your face and go — it's small enough to toss in your purse.

This hydrating serum with hyaluronic acid is backed by dermatologists, including Dr. Joshua Zeichner. He served on the external advisory panel of dermatologists who had access to the development and research of the serum and validated L'Oréal’s claims. 

"Hyaluronic acid is a humectant ingredient that pulls in hydration to the skin to plump and moisturize," Zeichner tells Yahoo. "It acts like a sponge and can bind to 1,000 times its weight in water." He adds that improved hydration results in the minimized appearance of fine lines and a boost of radiance. All it takes is a few drops in the morning and night, he says.

When it comes to drugstore mascaras, this one ranks, well, sky-high — it has over 79,000 five-star reviews. Its silicone applicator brush works to separate and lengthen lashes, while its tubing formula uses polymers that wrap around each lash to create a "tube," rather than just painting the product on. In turn, the tubes make lashes look thicker and longer, but not clumpy. 

If you want to look like you got a full eight hours of sleep (even if you didn't), try this affordable anti-aging eye cream. It's formulated with vitamins C and E, rosehip oil and organic hibiscus oil to brighten dark circles, hydrate the skin and reduce puffiness.

Want a plumper pout without visiting a plastic surgeon? Try a plumping lip gloss like this one by Maybelline. It's formulated with hyaluronic acid to hydrate and smooth lips (which can reduce fine lines and wrinkles). One Amazon shopper said, "This lip gloss is like fillers in a tube!" Choose from over 20 pretty shades on sale.

Dry hair and style it at the same time with this two-in-one hair dryer and brush. It can help you save time in the morning (who doesn't need that?) or at least give your 'do a little extra lift. Grab it while it's 20% off — and a fraction of the cost of a professional blowout.

Exfoliation is key to removing dead skin cells, but there are two ways to do it: With chemical exfoliants like acids or with physical exfoliants like brushes and washcloths. These exfoliating viscose cloths are easy to use, because they slip over your hand like a glove. Plus, while they feel smooth at first, they'll roughen up a bit under water, so you can exfoliate in the shower or tub with your favorite cleanser.