Five years after being treated for breast cancer, ‘‘Good Morning America’’ cohost Robin Roberts has a new health fight on her hands. Roberts is beginning chemotherapy treatment for myelodysplastic syndrome, a blood and bone marrow disease. Her older sister, Sally Ann , a TV anchor in New Orleans, is regarded as a perfect match to donate marrow and will do so. ‘‘My doctors tell me I’m going to beat this, and I know it’s true,’’ Roberts, 51, said on the show.

Crazy

“Joe [Perry] and I were fighting for a while — that’s no secret. But whatever demons or realities were going on, it happens with bands that stay together for 40 years and have the success that we have.” — Steven Tyler, on Aerosmith.