BEST
Slide 1: SIENNA MILLER went from long strawberry blonde layers to a blunt blonde bob with bangs.
Slide 2: SARAH MICHELLE GELLAR also chopped her hair into a bob and opted for brighter blonde highlights. It's so much fresher and makes her look years younger!
Slide 3: FAITH HILL cut her hair into a pixie. It's reminiscent of her "This Kiss" days and we LOVE it!
Slide 4: EMMA STONE always looks great, but this chin grazing red bob is just goreous!
Slide 5: LAUREN CONRAD went from a "LOB" to a full on piece-y bob.
Slide 6: TAYLOR SWIFT finally made a change to her natural long blonde cut and it paid off! The singer is rocking her new short cut!
Slide 7: NICOLE RICHIE went all kinds of colors this year. Very few people can pull off lilac AND turquoise, but she did it effortlessly.
Slide 8: JENNIFER LAWRENCE started the year with a pixie cut but let her layers grow out to a nice chin-length. This easy-going style matches her personality perfectly.

WORST
Slide 9: MALIN ACKERMAN followed suit with Miley Cyrus and cut her hair into a side-shaved faux-hawk. It's not our favorite look on her.
Slide 10: KATY PERRY went form a raven bob to slime green. She's now back to her original color...thank goodness!
Slide 11: LENA DUNHAM went from bruntette, to blonde to lime green. The cut is adorable on her but that color is so hard to pull off.
Slide 12: KYLIE JENNER had the most hair transformations this year than anyone else. The sad thing is, the look she started with really suits her the best. Luckily, it's inevitable that one day she'll go back to it.
Which celebrity do you think had the best transformation this year? Sound off in the comments below!