Jessica Simpson officially slips baby's gender, 'We're having a boy!' (Video)

News has slipped out that Fashion Star’s Jessica Simpson is expecting a baby boy, but the news was never confirmed until she appeared on Jimmy Kimmel Live and accidentally revealed the news.

According to People, Kimmel asked Simpson how she was feeling this time around. She replied, “I just feel awful, I’ve been vomiting. The crazy thing is, I never knew that a wiener could actually make me nauseous.”

Simpson, appearing stunned herself that she just let the big news slip, continued, “Well, I guess I just told the world that I’m having a boy!”

The 32-year-old singer and actress appeared on Ellen Wednesday where the comedian offered Simpson two onesies, one for a boy and one for a girl, and she was only allowed to take one. Naturally, the blonde beauty took the one for the boy.

Simpson and fiancé Eric Johnson’s son, who will be little brother to 10-month-old Maxwell Drew, will probably be their last child. She expressed to Kimmel, “I really don’t want to be pregnant again, because this pregnancy is really rocking my world right now.”

Check out her interview in the videos below: