Welcome to 12 Days of Party Beauty or "I've got 99 holiday problems, but hair and makeup ain't one." All week long, ELLE.com breaks down a new party-ready beauty look to try. Tonight, Karlie Kloss's flushed cheeks and Coca-Cola red lips.

Cut shoulders and back cleavage are cool, but nothing beats the more immediate beauty benefit of a sweaty workout: Karlie Kloss skin. What are the defining traits of Kloss' face? Perma-flushed cheeks with an ethereal flash of shine and impossible-to-fake-springiness. For L'Oréal's recent Women of Worth event, the gym-worshipping mega model gave the look a black tie feel, pairing glowy, locker room cheeks with matte red lips. 

Why flat red? "We decided to go with very luminous skin and minimal color, making her lips the focal point," explains Kloss's makeup pro, Sir John. For Kloss's mega bright matte red lips, he applied L'Oréal Paris Colour Riche Pure Reds Lipcolour in Blake's Red. "The bright, matte lip against her luminous skin was the perfect combo."

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