The 32-year-old singer, who got engaged to former rugby player George Kay two weeks ago, said she is happy about her marriage, reported Sun online.
"I knew George was 'the one' on our first date. I feel like he's always been in my life - it's like he's a part of me," she said.
And Katona, who first met Kay as a teenager before losing touch and then bumping into him again in a bar last year, insists that her marriage will be different this time round.
"The second time I got hitched (to Mark Croft) I was on drugs and it was a rebound thing. Now I've been clean for three years and I've never been so certain in my life," she added.