NASHVILLE - Kellie Pickler shaved her head to support a friend and raise awareness to the importance of early detection of breast cancer. Pickler and friend Summer Holt Miller buzzed their heads on Tuesday. Miller was just 36-years-old when she was diagnosed with breast cancer in June. Miller, whose family has a history of breast cancer, underwent a double mastectomy to remove a tumor detected early by doctors. She will begin chemotherapy treatments on Thursday. "Cancer does not discriminate," Pickler said. "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 said.