Beauty Hair Celebrity Hairstyles January Jones Just Gave You Another Reason to Get a Shag By Victoria Moorhouse Victoria Moorhouse Instagram Website Victoria Moorhouse is a writer, editor, and consultant based in Brooklyn, New York who focuses on beauty, fitness, and health. Victoria was previously the Senior Beauty Editor at InStyle.com and a Senior Editor at POPSUGAR. Her work can also be found in notable publications such as Shape.com, The Zoe Report, Forbes.com, and Well+Good. She graduated from The College of New Jersey with a Bachelor's Degree in Journalism and Professional Writing. InStyle's editorial guidelines Updated on March 7, 2017 @ 10:00AM Pin Share Tweet Email Photo: Jon Kopaloff/FilmMagic We have a feeling Betty Draper wouldn’t be a fan of the shag, but January Jones is a proud adopter of the most popular celebrity haircut of 2017. The actress debuted the fresh layered cut and her new choppy bangs on Instagram, thanking celebrity hairstylist for Bridget Brager for the look. The inspo behind the major hair change? Instead of bringing a snap of Amber Heard and Chloë Grace Moretz, two celebrities who recently took the plunge, Jones turned to two gorgeous vintage pics of Debbie Harry and Jane Birkin's iconic hairstyles. januaryjones/Instagram It's a far cry from her famous Mad Men character's perfectly coiffed 1950s bob and definitely different than the lob-length style she's wore of late, but we're really digging the new '70s-inspired look. VIDEO: How to Get Jessica Alba's Five-Minute Waves This Is the Most Popular Hairstyle on Pinterest Told you the shag was taking over.