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The mask keeps Rihannas strands strong and healthy over time, according to her stylist.

What do Hailey Bieber, Rihanna, andSelena Gomezhave in common?

k18-hair-mask

Photo: Getty Images and Sephora - Design: Alex Sandoval

And as far as he could tell, it had “really been working.”

And with a mere 4-minute leave-in time, this easy-to-use treatment makes adulting truly hassle-free.

(Psst: Selena Gomez is actually the queen of beauty secrets.

K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask

Sephora

Check out her $5 skincare find.)

a key protein in hair).

After thoroughly towel-or air-drying hair, apply onepump of the maskevenly from the root to tip of it.

Jennifer Aniston beside a lotion product

And while all this seems too good to be true, customers swear the K18 product is legit.

One shopper with bleach-treated strands said that after just three uses, they felt a difference in texture.

The high praise continued as they deemed the mask “better than Olaplex.”

A set of images displaying a person in athletic wear and a pair of camo-patterned leggings

(Want more recs for damaged hair?

Shoppers saythis Olaplex dupeis better than the original.)

Plus, it’s easier to find than ever after launching at Sephora earlier this year.

Hands touching nails focusing on nail health

Shop the Gomez and Rihanna-approved pick atSephora.combefore it flies off the shelves.

Shop More Shape-Approved Picks