This week in celebrity beauty Instagrams, we saw stars get ready for red carpets, runways shows, and Sundance premieres. Though temperatures are freezing in most places, these A-listers managed to look hot (thanks to a little help from their friends). Some highlights: Alexa Chung's Spring-ready floral nail art, January Jones's backstage beauty shot, and Joan Smalls's stunning cat-eye liner. See more of our favorite filtered photos, and don't forget to keep up with our editors by following POPSUGAR Beauty on Instagram!
And It's Backstage Beauty For the Win on Instagram!
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