The reality star opened up about her troubled past in an appearance on ITV1's This Morning earlier today, during which she discussed her infamous appearance on the show in 2008.
"It's a real sad story, but I'm really proud," Katona said. "The likes of some people who have sadly passed away like Amy Winehouse and Whitney Houston... I was on prescription medication and I was also taking A-class drugs so I'm really, really lucky to be alive.
"I found the strength to get through my demons and working with you guys again - that gave me a massive confidence, but I did kind of feel like you [Phillip Schofield] were my dad and I had to wait for his approval!
"It was a personal triumph, because I never thought I would make it to 30. I could've had my kids took off me. I should be dead, I was at an all time low which we witnessed here on live television.
"I was in a really unhappy marriage, I was in denial of my drug habit and I was really lost and lonely. I had no friends around me, no family. I'm really proud that I got through it."
Katona, who was recently spotted at a recording studio with Atomic Kitten, added that she was "ashamed and embarrassed" to discuss her drug abuse with her children.