At the end of August, Ulta Beauty slashed its outlook for the rest of the fiscal year. According to C-E-O Mary Dillon, Americans are spending more on skin care products, and less on cosmetics. But despite the recent cooling, Dillon has made Ulta a hot brand. Company revenue and stock prices have shot up since she took the helm in 20-13. Ulta has steadily opened new stores and inked deals with beauty influencers like Kylie Jenner.