Customizable Makeup: Build-Your-Own-Beauty Is Happening

Butter London's BeautyClutch features just the right amount of makeup (four pretty eyeshadows, a rosy blush and an iridescent shadow stick, all in a neutral shade range) to never weigh your makeup bag down. The best part? It's designed so you can swap in the exact shadow shades you want from their whole palette range!

• Buy It! Butter London BeautyClutch Palette, $39; ulta.com

Your skin's needs can change on a daily basis, depending on factors like the weather, your stress level and how much sleep you got. Target each day's different challenge with these "boosters," which can be used alone or added to your favorite skin products to target your specific concerns, including fine lines, redness, dark spots and more.

• Buy It! Paula's Choice Anti-Aging Boosters, $35 to $50 each; paulaschoice.com

Not sure which highlighter will give you your ideal shine this summer? Try Hourglass's customizable Ambient Lighting palette – you pick your top three shades (out of six shimmering options, including peach, pearlescent and beige), which are then housed in this pretty palette – and get glowing!

• Buy It! Hourglass Custom Ambient Lighting Palette, $70; hourglasscosmetics.com

Starting to run out of space in your medicine cabinet for all your glowy-skin potions? Skin Inc. wants to replace them all with one perfect product, comprised of the ingredients you decide you need based on the results of the Skin Identity Test. Once you figure out your mug's main concerns, three hydrating heavy-hitters are then blended into a customized concoction created to use day and night.

• Buy It! Skin Inc's My Daily Dose Custom-Blended Serum Set, $90; sephora.com

How is it possible that out of the zillions of foundation shades out there, it's so hard to find your (color) match made in heaven? The Body Shop feels your pain, which is why they launched shade-adjusting foundation drops; with two options (one to lighten and one to darken), you can blend to perfection. It's also perfect for adjusting a favorite shade depending on whether your skin is winter-pasty or summer-bronzed.

• Buy It! The Body Shop Shade-Adjusting Drops, $20 each; thebodyshop.com

Who knows better than the pros at Benefit exactly what products make the perfect kit? All you have to do is pick your theme (All About Eyes, Arch You Fabulous or Best of Benefit) and the brand will suggest exactly what to buy — all you have to do is pick the shade. Bonus: Each set comes with a free cosmetics bag!

• Buy It! Benefit Cosmetics Custom Makeup Kits, $50 to $79; benefitcosmetics.com

Color-correcting (the technique of counteracting skin concerns with certain shades, like green to combat redness) is having a major moment in the beauty space. This brand supplies four drops (in red, blue, green and golden algae), which can be used alone or mixed into your foundation to target that day's specific skin concern.

• Buy It! Algenist Concentrated Color Correcting Drops, $38 each; sephora.com

Not all mascara wands are alike. While some come equipped with bushy bristles to bring on the volume, others are long and sleek to lengthen lashes. But thanks to Buxom, you can hand-pick exactly what you want in a mascara wand, and with seven different options, you're bound to find one (or two!) that will instantly become a mainstay in your makeup bag.

• Buy It! Buxom Mascara Bar, $22 each; bareescentuals.com

When your skin is freaking out on you inexplicably but you don't want to fork over wads of cash for an entirely new skincare routine, Cover FX has an easy, two-second solution: custom drops. Whether you're looking for a hydration boost or trying to calm irritated skin, these pick-your-poison serums seamlessly blend into any product of your choosing — moisturizer, oil, foundation– to create a quick-fix tweak to your everyday routine.

• Buy It! Cover FX Custom Infusion Drops, $48 each; sephora.com