Country star Kellie Pickler is causing quite a buzz today after shaving off all her hair.

However, it's not a new look she's trying out, or a cry for help like Britney Spears' stunt back in 2007. It's quite the opposite actually.

She lost her locks as a show of solidarity to her best childhood friend, Summer Miller, who is battling breast cancer and starts chemotherapy tomorrow. Pickler refers to Miller as her "sister" and decided to undergo the hair buzzing yesterday in Nashville alongside Miller, who received her diagnosis this past June.

Pickler alluded to the big reveal of her new hairless self on her Twitter yesterday tweeting, "It's been a great life-changing day." She followed it up an hour later with a tweet stating, "Be sure to watch " Good Morning America" tomorrow morning (Sept 5th). You won't want to miss this!!! ;)"

Pickler sent us this exclusive video of the head shaving in action. She explained that Summer is only 35, and in addition to helping her friend through a tough time, she wanted to spread the message that early detection is key.

"Cancer does not discriminate," Pickler said in a statement to ABC News. "If this compels even one person to change their mentality toward waiting until the age of 40 for their mammogram, then it will be worth it," Miller added.

To read more about Miller's journey, click here.