Stella Parton gives insight into her sister Dolly Parton's marriage, makeup habits and views on death in an exclusive CBS News interview.

Dolly Parton died in Nashville on Aug. 25 at the age of 80 — a shock to fans around the world who weren't aware of her illness.

Dolly Parton hid her cancer battle not only from fans but also from her family, sister Stella tells 'CBS Mornings' in a new sit-down interview.