I think that's why I feel the way I do about Olivia Newton John. Yes, she had her successes, lots of chart hits, lots of awards, international stardom, etc., but it was very short lived - basically only 15 years or so of being at the top, from her late teens to early 30's.
She wanted a family but had a number of miscarriages and time ran out after having only one child, her daughter, which was a difficult and traumatic birth. She also set up a business, Koala Blue which crashed after a few years due to the recession.
Then just as she was re-launching herself after starting her family, preparing for a comeback tour, in 1992, she was diagnosed with breast cancer at only 44 years old, which fundamentally ended her mainstream career, even though treatment was successful. After that, she was still a prolific singer, songwriter and actor, but because of the risk of cancer returning, the "big" producers in the industry couldn't risk big projects (couldn't get insurance against cancellation etc)., so she basically self-produced, some songs/albums were financed by herself when no big record labels would take her on, and she could only land several low-key acting roles, and did lots of smaller live tours/concerts.
She also had troubled and problematic relationships, with one of her long time boyfriends disappearing on a fishing trip, and another earlier ex-fiance attempting suicide after breaking up!
Considering all the knocks she suffered, she always remained positive and genuinely loved life, loved people and loved animals. It's a combination of all that, that despite so many knocks and set backs, she never went off the rails, and always saw the positives in life.