Baby Watch

Sources directly connected with Justin Bieber tell TMZ ... the singer is adamant he never had sexual relations with the woman who claims she had his baby ... and as far as he knows, Justin has never even met her.

The woman in question reportedly filed a paternity suit against Justin, claiming she and JB had a special hug backstage at a recent concert at the Staples Center in L.A. ... and 9 months later, she popped out a baby, baby, baby, oh.

But we're told Justin believes the story was "completely made up."

Justin Bieber's legal team is ready to strike over allegations the singer impregnated a 20-year-old woman ... allegations that Team Bieber claims are "malicious, defamatory, and demonstrably false."

The woman in question reportedly filed a paternity suit against Justin, claiming she boned the underage singer backstage at one of his L.A. concerts ... and left with an embryonic party favor.

But a rep for Justin tells TMZ, "While we haven't yet seen the lawsuit, it's sad that someone would fabricate malicious, defamatory, and demonstrably false claims."

The rep adds, "We will vigorously pursue all available legal remedies to defend and protect Justin against these allegations."

Jessica Simpson has finally confirmed what everyone already knew ... she's pregnant.

The singer just tweeted, "It's true ... I"m going to be a mummy!" -- posting a pic of herself in a mummy costume ... holding her baby bump.

Scary.

Jessica Simpson arrived at JFK on Sunday with some extra baggage ... around her midsection.

While speculation is rampant that it's a baby bump, the 31-year-old has not confirmed if she is pregnant or not.

Looks like she may need those infamous mom jeans again after all.

"Bachelor" winner Shayne Lamas just treated her unborn fetus to its very first NUDE photo shoot ... and TMZ has the pics.

Lamas is weeks away from giving birth to her first child ... fathered by TheDirty.com honcho Nik Richie ... and before she pops, Shayne made sure to capture the beauty of pregnancy in all its stark naked glory.

Beyonce and her alleged baby bump (kidding!) went out for a stroll in New York City yesterday.

Sorry Internet conspiracy theorists, Beyonce's rep claims her baby bump is 100% authentic ... despite a video in which her stomach appears to fold over, leading many to believe she was wearing a prosthetic.

B's rep told ABC ... rumors about the singer wearing a fake baby bump underneath her dress are "stupid, ridiculous and false."

Also, there are photos of Beyonce in a bikini ... in which you can clearly see her actual, pregnant stomach.

So, there you have it.

We know it sounds ridiculous ... but the Internet is buzzing with rumors that Beyonce is NOT really pregnant and she's wearing a fake stomach in an elaborate cover-up. Now, a controversial new video is fueling the fire.

Beyonce appeared on an Australian TV show this weekend called "Sunday Night" -- wearing a tight red dress that accentuated her baby bump.

But when B sits down in her chair, her bump appears to collapse inward, leading many to believe it's not B's real bump after all ... but a prosthetic device intended to deceive.

So why would B fake preggo? There are rumors that she has hired a surrogate mother to carry the kid, so she won't have to put her body through the strains of pregnancy.

But color us skeptical -- because last month, Bey bared all during a vacation in Croatia with Jay-Z ... revealing what looks like a totally legit baby bump.

We called B's camp for comment -- but we haven't heard back yet.

So, we gotta ask ...

WHICH IS MORE SHOCKING -- that pregnant "Bachelor" winner Shayne Lamas is going to name her kid PRESS ... or that her unborn child is about sign a deal with a talent agency ... from inside the womb??!?!?

TMZ has learned ... Shayne and her hubby -- TheDirty.com honcho Nik Richie -- are in talks with a management company called Z Group -- which has made a formal offer to represent the baby ... even though it's still TWO MONTHS away from being born.

According to the contract, the company would get 15% of whatever the kid makes in an entertainment job ... including writer, editor, performer, musician artist, etc.

The January Jones baby daddy mystery continues ... because the actress left a big, fat BLANK SPOT on her son's birth certificate in the space where she's supposed to name the father.

TMZ obtained the document, filed Friday with the L.A. County Dept. of Public Health, which shows January's son, Xander Dane Jones, was born on Sept. 13, 2011.

Several famous studs have been rumored to be the father -- including "SNL" star Jason Sudeikis, super chef Bobby Flay, "X-Men" director Matthew Vaughn ... and "Seeking Justice" co-star Xander Berkeley.

So far, mom continues to remain mum.

Carrying Jay-Z's unborn not only has Beyonce glowing ... it's got her sparkling too.

The gorgeous mom-to-be was radiant in a glittery blue jacket and mini-dress in NYC last night.

Bey is due in February.

After revealing she was pregnant on the VMAs last week, Beyonce -- who just turned 30 -- showed off her growing bare baby bump while vacationing with Jay-Z in Croatia on Tuesday.

Her destiny's child is in there.

Mel B's fetus made it VERY clear -- he or she is READY to leave the womb ... because the Spice Girl arrived to an L.A. hospital this morning looking like she's ready to pop!!!

Flanked by her hubby, Stephen Belafonte and a bodyguard ... Mel arrived to the hospital before the sun came up.

It's a little creepy ... but THIS is how Beyonce and Jay Z's kid might look ... if it's a boy -- at least according to one famous forensic artist.

Dr. D'Lynn Waldron -- who's worked as a consultant for the FBI -- has just released a new digital image ... showing how she thinks the kid will look ... after he's old enough to pop his own collar.

Waldron believes the kid will have his "father's features, mother's eyes."

No pressure, kid.

Beyonce isn't going to let a little thing like a FETUS get in the way of her October 8 MJ Tribute Concert gig -- TMZ has learned ... the mom-to-be still plans to bust out a song and dance for the King of Pop's tribute show.

Reps for the concert confirmed -- Beyonce is still slated to sing via satellite -- saying the "pregnancy will not affect her performance".

Beyonce is rumored to be nearing the 4 month mark in her pregnancy -- and if the rumors are true, she'll be a solid 5 months preggo when she performs her favorite Jackson 5 song for the concert.

Fun Preggo Fact: According to WebMD, women who were physically active before pregnancy should be good to continue with moderate exercise for the duration of the pregnancy ... as long as any potential "abdominal trauma" is avoided.