Whether you're a popstar-turned-reality star or a royal, it seems that keeping mum on your unborn baby's gender is hard to do. Duchess Catherine seems to have spilled the beans on which sex she's expecting during a recent visit to the English town Grimsby.

According to 67 year-old Sandra Cook, Mrs. Prince William - upon receiving a teddy bear from someone in a crowd outside the town's fishing museum - said, "Thank you, I will take that for my d-..."

"I said to her: 'You were going to say daughter, weren't you?'" Cook added. To no one's surprise, Kate tried to save face by claiming that neither she nor William know the sex of the baby and added, "We're not telling."

Unless the duchess slips up in a more prominent manner or decides to announce the gender publicly, it looks like we'll all have to wait until the baby is born in July to find out whether Ms. Cook truly does have a sharp ear!