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So, what's their secret? In an interview with the UK's Daily Mail, Kourt and Khloe spilled some of their favorite beauty tricks.
Of course, they both love Hairfinity, the hair supplement they were in London to promote. What else, though?
They're both big fans of coconut oil. "Coconut oil can do everything," Khloe joked, saying that while it helps with dry hair, you can also use it on your body.
Khlo is also a fan of contouring. "Contouring is the best. It's amazing, once you start, you can't stop," she insists. "Sometimes people will say: 'Oh, you've got a nose job' but I just forgot to contour!"
As for Kim, she likes Neutrogena face wipes and (surprise!) the Kardashian Beauty dry shampoo and conditioner, which will be coming out soon. She also insists that a good tan is crucial, saying "tanning is everything."
One beauty secret they both share: Little sis Kylie Jenner, admitting that they often turn to her for beauty and style ideas. We can't blame them there, we're totally obsessed with Kylie's style, too!