K-beauty, aka Korean beauty , has quickly expanded to the rest of the world over the past five years thanks to life-changing products. From BB creams (beauty balms that make you look like you're not wearing any makeup) to essences (highly concentrated, yet lightweight topical treatments that go on before serums and moisturizers), you can't walk into a Sephora or Ulta without seeing a display highlighting Korean skincare.

But one of the most popular K-beauty trends to have taken off this year has been face sheet masks. Supermodels Chrissy Teigen and Karolina Kurkova, comedian Chelsea Handler and actor James Franco have uploaded photos of themselves on social media sporting face sheet masks , which make them resemble Jason Voorhees from "Friday the 13th."