News January Jones Debuts 'Grease'-Inspired Pink Hair By Jessica Roy 4:55 PM PDT, March 13, 2015 Instagram As the countdown to the final episodes of Mad Men approaches, January Jones celebrated appropriately -- with a decidedly modern dye job.On Thursday night, Jones showed off her new pink hair that will be sending thousands of women to their stylists over the next few weeks.Alongside a photo of herself at a salon, she posted, "Can you guess where I'm going with this? #backtomyroots" View this post on InstagramCan you guess where I'm going with this? #backtomyroots 😉A post shared by January Jones (@januaryjones) on Mar 12, 2015 at 3:30pm PDT NEWS: The Party's (Almost) Over for Mad MenA few hours later, the Last Man on Earth star debuted the result: Beautiful blush-pink locks. She wrote that they were inspired by the movie Grease."Call me 'Frenchie'," she wrote. "Thanks for the dip @jenniferjbeauty." View this post on InstagramCall me "Frenchie".. Thanks for the dip @jenniferjbeautyA post shared by January Jones (@januaryjones) on Mar 12, 2015 at 7:35pm PDTIn the past, Jones has rocked blonde, brunette, and red hair, and in 2012, the 37-year-old actress sported pale pink highlights (possibly the "roots" she was referring to).Getty ImagesWas she inspired by pal Nicole Richie's new hair? Either way, it looks like it’s a pink world in 2015!See more celebrity hair transformations:Related GalleryTwo Looks, One Star: Major Celeb Hair Transformations!