Joan Lunden Joan Lunden

Joan Lunden is staying strong following her recent diagnosis of triple negative breast cancer, a rare and aggressive form of the disease.

After completing her second chemotherapy treatment on June 26, "she was expected to start losing her hair in the coming week," a family friend told People. "So she took matters into her own hands and shaved her head. She wanted to do it on her own terms, and she looks stunning."

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Lunden, 63, first revealed she has breast cancer during a June 24 sit down with Robin Roberts, who survived the disease, on Good Morning America (Lunden anchored the morning show for 17 years). "I knew that he would want me to use this experience as an opportunity to spread the word about how important it is to get screened for all types of cancers and for women to do self-breast exams," she said in a blog post discussing the diagnosis. "I know I have a challenge ahead of me in this journey, however I have chosen to take it as an opportunity to fulfill my father's legacy and try to inspire others to protect their health." 

Throughout this trying ordeal, Lunden has drawn strength from her family, including husband Jeff Konigsberg and her seven children. "Right away, she went into lioness mode protecting her family," the friend said. "She didn't want to upset the kids before summer camp."