This past Halloween, Jessica Simpson announced via Twitter that she and fiancé Eric Johnson were expecting their first child. It's true, Simpson, 31, tweeted with a picture of her dressed up as a mummy. I am going to be a mummy.

When Simpson first announced her pregnancy and pictures of the very visible baby bulge hit the web, experts predicted that the singer and fashion designer was at least six months pregnant. A Boston gynecologist, Dave David, told Radar Online that in late October, Simpson looked to be heading into her third trimester. She looks to be 26 weeks, which is around six months, said David.

If Simpson was estimated to be six months pregnant at the end of October, that would mean that she would be at around 12 months pregnant right now...three months way overdue.

Is Jessica Simpson really pregnant? Is her belly from a junk food overload? Is she wearing a fake belly while a surrogate carries her baby? Or is she pregnant with an alien or demon spawn?

According to Dr. David, in October he said that It is definitely a pregnancy and not weight gain. You can [tell] by the shape of her abdomen, her belly wouldn't be that rounded if it was just fat.

If the doctor is correct, that leaves either a surrogate or alien/demon spawn as possible answers to her ridiculously long pregnancy.

TMZ however has another theory. With the recent death of Dick Clark, TMZ believes that Simpson finally did give birth, and is just waiting to announce it until she can have the magazine covers all to herself. Simpson, however, tweeted on April 21, To everyone who keeps congratulating me on the birth of my baby girl...I'm still pregnant!! Don't believe what you read ladies and gents.

Does this mean we shouldn't believe Jessica Simpson's tweet?

What do you think of Jessica Simpson's pregnancy?

Take a look at 3 other celebrity pregnancy conspiracies.

Jessica Simpson
Singer and actress Jessica Simpson is pregnant with fiance, ex-NFL star Eric Johnson. She posed naked of the April issue of Elle magazine.Is it possible that she is 12 months pregnant? Elle Magazine
Snooki
Snooki announced her pregnancy at the beginning of March, prompting many to wonder if the reality TV star's due date is Dec. 21, 2012...the day that the Mayans predicted the world will end.At the time of the announcement, a source had told E! Online's Marc Malkin that "She's about three to four months along." If that statement was true that would mean that Snooki would be due in August or September.That hasn't stopped Twitter users from speculating that she is due on 12/21/12 though.@SumpatiK0 -- "Snooki is pregnant...Damn, the Dec. 21. 12 theory must be true."@IamJackyBlack -- "Snooki is pregnant with a due date of December 21st, 2012. Touché , Mayans. Touché." Twitter/megkheath
Beyonce
From the moment that Beyonce announced her pregnancy at the VMA’s, many speculated that the singer wasn’t pregnant. Bossip.com reported that right before she announced her pregnancy, she was doing flips on stage for her audience, something that a pregnant woman would not do. The conspiracy rumors escalated when Beyonce’s stomach was caught deflating when she sat down for an interview on a TV show. When Beyonce finally gave birth to baby Blue Ivy Carter, many were still speculating that she didn’t actually give birth when she reemerged in front of cameras with a rockin’ post baby body. http://helloblueivycarter.tumb
Sarah Palin Bristol Palin
It’s been widely speculated that Sarah Palin’s youngest son Trig is actually her daughter Bristol’s baby. It was reported that when Sarah Palin announced she was seven months pregnant in early March 2008, it came as a shock to co-workers because “she displayed no signs of pregnancy whatsoever during the previous seven months,” reported Babble.com.Further fueling the idea that Trig is actually Bristol’s son is the fact that Palin doesn’t look pregnant in any photos taken of her during her pregnancy. Bristol was also reported to be absent for 4-5 months from school due to mono. That time absent also happens to be the last 4-5 months of Palin’s pregnancy. Reuters
Twitter Twitter Beyonce