The Fergalicious (whatever that is) singer has dragged herself back from the brink of a crippling drug addiction and through the break-up of her marriage to release her first solo album in 11 years, Double Duchess, earlier this year.
Drugs can do weird stuff to your brain. Even smoking a bit of weed can make you crazy paranoid. After taking harder stuff, the effects can be even weirder and leave you in bigger trouble.
This is what happened to Black Eyed Peas singer Fergie, who has given a revealing interview to i News about her fight against drug addiction.
She has previously described getting over her drug problems as 'the hardest boyfriend I've ever had to break up with'.
It began in the 2000's with ecstasy and moved on to crystal meth before she found God and got herself clean.
The star has revealed that she thought she was being tracked by the C.I.A and the F.B.I as well as seeing things that weren't there at all.
She told the newspaper: "I was [suffering from] chemically-induced psychosis and dementia. I was hallucinating on a daily basis.
"It took a year after getting off that drug for the chemicals in my brain to settle so that I stopped seeing things. I'd just be sitting there, seeing a random bee or bunny.
"I remember thinking, 'if I walk outside and the SWAT team's out there, I was right all along. But if they're not out there, then it's the drugs making me see things and I'm going to end up in an institution. And if it really is the drugs, I don't want to live my life like this anymore, anyway'.
"I walked out of the church; obviously there was no SWAT team, it was just me in a parking lot. It was a freeing moment.
"The drugs thing, it was a hell of a lot of fun... until it wasn't. But you know what, I thank the day it happened to me. Because that's my strength, my faith, my hope for something better."
Luckily for Ferg, she is now off the drugs and brought a new album out in September. Double Duchess was her first solo album in 11 years.
It hasn't been easy for her recently though. She has also split with her husband, Hollywood actor Josh Duhamel, although the two parted on good terms and will continue to raise their 4-year-old son Axl together.
A Joint statement said: "With absolute love and respect we decided to separate as a couple earlier this year.
"To give our family the best opportunity to adjust, we wanted to keep this a private matter before sharing it with the public."
Featured Image Credit: PA