"I have no idea what I'm going to buy Beyonce at the baby shower because Jay is going to buy that little girl every single thing possible. She won't be spoiled but she will be very well looked-after," she told BANG Showbiz.

Whoops… It's a girl! Rowland seemingly didn't realize she may have inadvertently confirmed the supposed-to-be-top-secret news, continuing on with the interview without mentioning the slip-up. Or maybe she was just hoping no one would notice if she played it cool.

The "Motivation" singer can be partially excused: she had just snapped up the Ultimate TV Personality prize (at Cosmopolitan's Ultimate Women of the Year Awards) for her work as a judge on the British "X Factor."

Talking about the little lady-in-waiting-to-be-born, Rowland claims she'll even stick around for the less-adorable things babies do.

"I'll be on hand for babysitting duties and I'm actually very good with messy diapers," she assured reporters. Considering she just spilled the well-sealed beans, Jay and Bey just might take her up on that diaper duty offer.