"Gavin accidentally locked me in the car and the alarm was going off, so people were coming out of B&Q hearing the alarm and looking at the car, and then seeing it's Charlotte Church in there," the Daily Mail quoted her, as telling OK! Magazine.
"I was just trying to hide but couldn't - just sitting there having contractions!" she said.
She insists that she is in no rush to get her figure back.
"I think it's sad when people get obsessed with all of that. I'm pretty happy with the way I am and I bagged Gavin so I can't be doing that badly, can I?" she said