Kellie Pickler’s long blonde locks are no more!

The country superstar buzzed all of her hair off alongside her best friend Summer Holt Miller, who was diagnosed with breast cancer in June.

The two went bald to bring awareness to early breast cancer detection. Kellie mentions “cancer does not discriminate” and tweeted buzzing her hair was “life changing.”

Summer, whom Kellie refers to as her “sister,” detected her breast cancer at 36, 4 years before most women get their first mammogram.

“If this compels even one person to change their mentality toward waiting until the age of 40 for their mammogram,” Summer says, “then it will be worth it.”

Summer underwent a double mastectomy and begins chemotherapy this week.

In Summer’s honor, Athena Water will contribute a minimum of $2 million to support breast cancer awareness, care, education and research by 2014.