Brian McFadden said his daughters are "cheekier" to their mum, Kerry Katona, than they are with him.
The former Westlife star (35), also said he worried about Mollie (14) and Lilly-Sue (12) growing up in the digital age.
"I get the rare cheeky comment, but their mum, Kerry, tells me they are a lot cheekier around her - they're warier in front of their dad," he said.
"I think all parents worry about their children nowadays because they're so open to things on the internet.
"My girls seem so much older than I was at their age," he added.
McFadden, who recently split from Vogue Williams, also told OK magazine he would be open to having more children.