Singer Fergie says she suffered from symptoms of psychosis and dementia due to her drug addiction to methamphetamine, commonly known as crystal meth.
"At my lowest point, I was (suffering from) chemically-induced psychosis and dementia," Fergie told i newspaper, reports dailymail.co.uk.
"I was basically hallucinating on a daily basis. It took a year after getting off that particular drug for the chemicals in my brain to settle so that I actually stopped seeing things," she added.
Reflecting on the intense consequences of the drug, she said: "I'd just be sitting there, seeing a random bee or a bunny."
In September, Fergie had announced a split from husband Josh Duhamel after eight years of marriage.
On the difficulty of juggling work and separation struggles, Fergie said:: "I've just released my first solo album in 11 years, and I'm out promoting it. So there's really a lot going on. That's why we wanted to find our footing with our separation before we announced it publicly -- to make sure we really got it together for our kid."
They have a son named Axl, who was born in 2013.
