The 30-year-old TV personality, who has recently spoken about her desire to move into acting, left her management company last month, prompting tabloid speculation as to the reasons behind her exit.
"I'm really good," Katona told Star magazine of her current situation. "Even though I keep seeing stories saying, 'Kerry's gone off the rails again!'"
On leaving Can Associates, she admitted to feeling "freer", commenting: "It was a big decision to take, but it was for the best. I think the reason I cried was more due to whoever spread the 'Kerry is back on drugs and she's been dropped because she went on a six-hour drinking binge' story.
"That's a load of b*llocks. I left because it's just time to move on. I wanted to do more acting and Claire's not an acting agent. For goodness' sake, if that was really the case, I've been on longer drinking sessions with Claire herself!
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"The only thing that has got me down is people thinking that I'm back on drugs. I feel that stigma is always going to stick with me and that's something I have to live with."
Katona added: "Claire's a manager, she's not a celebrity, and it should not be this big a deal about changing your management team. It's like getting a new boss at work."
Discussing her acting ambitions, Katona explained that she would love a "comical" role: "For me, acting is just dead easy. You're somebody else and you leave your world behind. I'd love to be in Waterloo Road or a psycho in Coronation Street!"
"As for my drinking, I'm not going to apologise for going to Marbella and having a drink on a girlie holiday. I work my arse off. I play mum and dad to four little babies. I go out and earn a living, I get no maintenance - I'm entitled to go on holiday and let my hair down. I got pissed and enjoyed every minute of it! I woke up with some stonking hangovers, but I loved it. Next year I'm going to Ibiza!"
Read the full story in this week's Star magazine - out today.
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Watch Digital Spy's interview with Kerry Katona from March 2011 below: