Popping your collar is so early 2000s. The hottest collar trend has changed to necklace form, and we love the way this chic accessory dresses up an outfit! The best part? Simply adding a collar necklace to a shirt or dress practically makes it an entirely new outfit! We’ve seen this piece worn two different ways: as a necklace over a top or dress with a low neckline, or with a high neckline. Either way you wear it, you’re bound to look totally fashionable and unique! Read on to see how some of our fave celebs (like Hailee Steinfeld and Jessica Chastain) sport their collar necklaces.