[RegulatorCountry]

Debbie Harry hasn’t always looked so well-kept. She was beautiful in her heyday and looks good now, but there was a decade or so that apparently was pretty rough, no idea why. I just recall being saddened when I saw her on some late night show, 10 maybe 15 years ago.

[freeandfreezing]

there was a decade or so that apparently was pretty rough

Drugs, sadly.

[Moonman62]

Debbie Harry hasn’t always looked so well-kept. She was beautiful in her heyday and looks good now, but there was a decade or so that apparently was pretty rough, no idea why. I just recall being saddened when I saw her on some late night show, 10 maybe 15 years ago.

...

She was in her early 30’s by the time Blondie hit it big, so she was always a bit older than rest. She also took some time off to take care of one of her sick bandmates. IMO, she is one of the best pop/rock singers, ever.

[CatherineofAragon]

"Debbie Harry hasn’t always looked so well-kept. She was beautiful in her heyday and looks good now, but there was a decade or so that apparently was pretty rough, no idea why. I just recall being saddened when I saw her on some late night show, 10 maybe 15 years ago."

I know she took some time off to take care of her boyfriend, who had some kind of rare disease. Maybe that's the period you're thinking of...it was probably a hard go for her.