With 2013 already in full swing, many of us are resolving to make changes, so why not start with your hair? Before booking a salon appointment, head over to our Hollywood Makeover Tool to get inspired by the hottest celebrity hairstyles. You'll be able to see yourself in Amanda Seyfried’s layers from our January cover, Rose Byrne’s sleek bob, Reese Witherspoon’s gold highlights, or Naomi Watts’s retro waves—no scissors or dye required. Once you've found the perfect look, share it on Facebook and Twitter to let your friends weigh in, and print out a picture for your hairstylist. Forget having a good hair day, here's to a good hair year! Click the box below to start now.