Adam is currently appearing on The Big Reunion alongside Dane Bowers, Gareth Gates, Kenzie and Kavana in new band 5th Story and has credited Katy - who is a news correspondent for ITV1's Daybreak - as his "rock".
Speaking on Lorraine today, Adam said: "She's [my rock]. She's the one who convinced me to do the show.
"I was going to say no. I was kind of like, 'I didn't enjoy it much the first time around', and she was the one who said, 'Look, you are who you are now and you're a completely different man. Go and see what it's like and see if you enjoy it'.
"Once I met the boys, it was a no brainer. I just knew it was something I could enjoy."
Prior to his appearance on Lorraine, Katy - who is enjoying a rare day off - took to Twitter to encourage fans to tune in.
"I may have had an impromptu lie in this morn but @adamrickitt is making up for it! He and @WeAre5thStory speak to @reallorraine!" she tweeted.
She later messaged her colleague Lorraine Kelly to say: "Thanks for being so lovely to the boys @reallorraine they had whale of a time!"
Adam, who found fame in Coronation Street during the 90s before launching a pop career, got engaged to Katy in August 2012.
At the time, Katy tweeted: "Ok so...... I'm engaged!!! So happy I could combust love u @adamrickitt."
The Big Reunion 2014: Then and now
Copyright: Rex Features