We're living in the era of K-Food, K-Fashion, K-pop, and K-culture. Many of the hottest, trendiest, and most viral products in the U.S. these days are Korean. Korean cosmetics, in particular, have been viral for quite some time. Starting with high-end brands like Sulwhasoo,mid-range lines like Isa Knox and Ohui gained attention,and now even budget-friendly brands like The Face Shop and Olive Yo..