The 38-year-old former glamour model was married to the Australian singer from 2005 until 2009, but went onto marry and divorce cross-dressing cage fighter Alex Reid, and third husband Kieran Hayler, who she split from last month.
And she now claims that she never loved anyone as much as she loved Peter.
However, Katie, who is currently on a UK tour, said even the former chart topper had his flaws, and moand about the fact that men let themselves go when they enter a relationship with her.
“They said ‘Once you’ve had Greek you’ve hit your peak’. Well I didn’t!”
“Pete was the love of my life, but he was short. I thought he was fit but so short.
“Why is it that when I meet the man they are fit, then when they are with me they get fat? They are happy that’s why,” she said during her ‘Audience with Katie Price’ show at the Gordon Craig Theatre in Stevenage
Katie also opened up about her former boyfriend Dwight Yorke, with whom she has 15-year-old Harvey, and added: “They say ‘Once you’ve had black you never go back. And I did!”
Katie left no stone unturned, and told the crowd Alex – who infamously has a cross-dressing alter ego named Roxanne – was the worst in the bedroom.
She said: “I don’t want to f**k a woman I want to f**k a man. I didn’t know [he was a cross-dresser] before I married him.”
The denial comes after Peter reportedly sought legal action against his ex.