The K18 leave-in hair mask is loved by celebrity stylists and A-listers alike for its transformative properties that leave damaged straw-like hair smooth, revived and luscious in just four minutes When a beauty product is backed by some of Hollywood's biggest stars, you know it's going to be good. While these high-end products are usually accompanied by a pretty hefty price tag, one hair mask that has been raved about by Hailey Bieber, Selena Gomez and Khloe Kardashian has had its price massively reduced at beauty store Sephora. Now costing £54.

99 down from £70, the K18 Leave-in Molecular Repair Hair Mask Treatment for Damaged Hair has been cited as a mask that 'clinically reverses damage in four minutes'. This includes damage from the likes of bleach, colour, chemical services and heat. The mask is designed to revive your hair's strength, softness, smoothness and bounce.

The key ingredient that magically transforms hair is that of the brand's patented K18 peptide which, as described on Sephora, is "just the right size and molecular structure to reach the innermost layers of hair and re-connect broken keratin chains responsible for hair's strength and elasticity". Read more: This £30 'no makeup mascara' combines a serum and mascara in one for naturally longer thicker lashes Read more: Ashley Roberts' cream denim River Island co-ord plays into the cowboy core trend perfectly Claiming to restore your hair's joie de vivre in just two uses by up to 82%, the mask only needs fou.