Having worked with some of the most amazing hairstylists in the business, you could say that Barrymore has learned a thing or two about keeping her hair in tip-top shape. (This is also out of necessity seeing as she likes styling her hair so much.) There are two hair hacks that she's picked up over the years that she swears by.
First: "Dust your ends if your hair is in dire shape — it will really help it and transform it," said Barrymore. (For anyone who isn't familiar, dusting is a cutting technique where you trim off dead ends without removing length from your hair.)
She also loves Malibu C hair treatments, like the Malibu C Hard Water Wellness Hair Remedy ($18). "When you do it, you can wear it as a mask or there's a five-minute treatment and your hair looks mouthwash — it comes out like green, and it just gets all the sediment, and water, and chlorine, and everything that's in our hair out," she said.