Now this is friendship. Kellie Pickler appeared in a video clip on Good Morning America Wednesday sporting a very different look: a totally shaved head.

The country starlet buzzed off her blonde locks on Tuesday in support of her best friend, Summer Holt Miller, 36, who was diagnosed with breast cancer in June and is starting chemotherapy treatments on Thursday.

“Cancer does not discriminate,” Pickler said in a release. Added Miller, “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.”