Talk about letting the cat out of the bag!

Jessica Simpson accidentally confirmed she was expecting a baby boy during an appearance on Jimmy Kimmel Live last night, and she couldn't have done it in a more typical fashion!

The blonde bombshell was chatting with the talk show host about her second pregnancy and how she has experienced bad morning sickness this time around when she accidentally revealed the gender of her unborn child.

"The crazy thing is I never knew a weiner could make me nauseous," she joked before adding, "Well, I guess I just told the world that I'm having a boy!"

Her little man, rumored to be named Ace, will join 10-month-old sister Maxwell. The fashion mogul might have expanded her family at a rapid rate, but she has a plan to pause the baby making long enough to make it down the aisle with fiance Eric Johnson!

"Maybe I should go back to when I was younger. I was a virgin before I married [to Nick Lachey], so maybe I should just completely reverse and just stop having sex all together until Eric and I actually say 'I do'," she kidded.

That's probably a good idea!