Most celeb moms-to-be keep the gender of their unborn babies a secret until later on in their pregnancies, which is what singer Kelly Rowland planned to do, until she mistakenly let it slip during an interview with Fox 411 that she's having a baby boy.

When asked how she was holding up during her pregnancy, Rowland slipped up by referring to her baby as "him."

"We're very excited. So far, everything has been good. I just feel like the baby is already rotten–like literally, my Caress family has gotten him all of his little bathing stuff, his toys–it's just so cool."

Moments later she realized she'd said too much and straight up admitted she was having a son.

"It, it's...aw, f--k it! It's a boy. It's a boy!"

She then proceeded to call her husband, Tim Witherspoon, and let him know the secret is out. She was heard telling her rep,

"Can you please tell him that I spilled the beans?" Kelly looked down and caressed her growing bump. "I'm sorry, baby," she said, laughing. "But yes, it's very exciting."

Check out flicks of the glowing Kelly Rowland in the gallery.

Source: Fox411