We're glad she made it to the other side.

Fergie just opened up about her past crystal meth drug addiction, and we had no idea she was ever this bad.

"I was hallucinating on a daily basis. It took a year after getting after 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," she told the U.K.'s iNews.

During the worst of it, the singer thought the CIA and SWAT teams were following her, and she tried to hide in a church.

"They tried to kick me out, because I was moving down the aisles in this crazy way, as I thought there was an infrared camera in the church trying to check for my body. I bolted past the altar into a hallway and two people were chasing me. 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,’” she recalled.

Ultimately, that moment was a turning point in her life.

"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 me. Because that’s my strength, my faith, my hope for something better. It’s incredible. I must have guardian angels," she added.

She really turned it all around!