Debbie Harry was "absolutely" a drug addict for "a couple of years".
The Blondie singer has admitted she "tried everything", including heroin, and at one point in the late 80s was addicted to drugs.
When asked if she was a junkie, Debbie replied: "Absolutely. I guess for a couple of years."
She described that period of her life as very difficult, saying: "It was depression… our record company dropped us, our manager walked out, the Internal Revenue Service (IRS) walked in. Everything fell apart and I fell apart along with it. But ice cream was great."
The 'Heart of Glass' hitmaker did, however, turn things around, going to rehab with her then boyfriend, Blondie guitarist Chris Stein.
She added: "Chris did it at the same time, we did it together. I think we both decided that it was overdue."
Debbie also admitted she has tried drugs since, but has remained largely sober, and doesn't even drink alcohol.
She said: "I think there was a short period where I did some cocaine, but I've never got seriously involved since then.
"I don't' have the head for alcohol. I don't have the capacity. So, if I drink it's a short evening - very short and very cheap!"
Blondie's new album 'Panic Of Girls' is released on May 30.