The Black Eyed Peas singer successfully fought a battle against a dependency on illicit substance crystal methamphetamine - known as crystal meth - and thinks the days of her excesses had both good and bad points.
She said: "I think that sometimes it leads to brilliance and other times it leads to disaster. That`s my answer."
Fergie`s bandmate Taboo has also previously battled an addiction to drugs and alcohol and admits his lifestyle in the band made it difficult to give up his deadly habits.
He said: "The excess of partying for me was out of control and it just let me to a place where I crashed really hard. It wasn`t just about me, I was damaging my family and almost my career.
"The thing is, when you do have that addictive personality and you have success and fame, it`s there every night. And you partake. And you get caught up, `Oh, I`ll stop tomorrow.` I`d look at myself in the mirror and say, `I`m going to stop,` and next day go to the drug dealer. But I bounced back."
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