Demi Lovato's 20th Birthday: A Look Back At Her Style Evolution (PHOTOS)
In just a short amount of time, Lovato has blossomed from Disney princess to true fashion icon, donning looks that are both fashion-forward and daring.
She may have had a rough adolescence, but the X-Factor judge is finally putting those teenage years behind her as she steps into her early twenties.
Celebuzz is celebrating her new new adulthood with a look back at the star's style evolution.
Lovato has transformed her hair several times over the years -- from dark brown tresses to blonde hair with crayon-colored tips.
As for her apparel, the "Give Your Heart a Break" singer first took on the musical scene by donning feminine frocks, but has amped up her looks to rocker-chic in the last couple of years. This has included everything from studs, to bold lips and, yes, leather.
Click through our gallery to see Demi's changing looks. Also be sure to wish Lovato a very happy birthday in the comments, below.