And now, Kellie's mane is slowly but surely coming back. And she looks just as adorable as ever.
The singer took to Twitter this week, showing off her hair growth, which has formed itself into a perfectly perky 'do.
"My hair is starting to grow back...rocking' the pixie cut! ;)" she captioned the photo, posted to her WhoSay.com account.
Pickler went under the razor back in September, showing solidarity for her childhood BFF Summer Holt Miller, who was diagnosed with breast cancer over the summer.
So not only is Kellie looking good, she's doing good, too. Way to go, Kel!