AceShowbiz - Mariah Carey's concerned husband Nick Cannon is calling on his pregnant wife to box up her famous high heels now she's expecting the couple's first child. The pop superstar confirmed rumors she was expecting earlier this week and her husband is already worried she might topple over again - like she did during a concert in Singapore in September.

Cannon grumbled about his battle to keep his glamorous wife out of heels during his U.S. radio show, Rollin' With Nick Cannon, on Friday, October 29, revealing "I come home yesterday to help my wife get ready for her video shoots and she has these 19-inch heels on."

"So I go into the closet searching for some flats for my wife... She got a lot of damn shoes - it's like a freakin' Macy's. (But) Mariah Carey does not own one pair of flat shoes. And then we did find some flats and they were a regular ballet slipper... I was like, 'I don't think so'."

Carey phoned in to defend herself, explaining, "To be fair, I had some boots from Aspen, some Dior boots!" But Cannon wasn't happy with the idea of his wife tramping around New York in "ski boots" and added, "I'm going shoe shopping today, needless to say, to buy you some flat shoes."