MARIAH BABY MANIA: 1.) A couple of weeks ago we reported how MARIAH CAREY had referred to her unborn child as ‘they’ in a radio interview while talking about how she sings tracks from her new Christmas C.D to her baby bump ...  and it turns out  it WAS a slip after all: Mariah IS having twins. 

Hubby NICK CANNON announced it yesterday on his New York radio show.  But his listeners weren't the first to know.  That honor went to BARACK and MICHELLE OBAMA. Cannon said he and Mariah ran into the Obamas backstage at the taping of the "Christmas in Washington" special last  Sunday night, and they actually ASKED Mariah if she was having twins. Wow, I think our President and First Lady called her fat!!!

Said Nick, quote, "And because of the excitement, because of the emotion, she was overwhelmed [and] she shared with the President and First Lady that we are having twins." (--"Christmas in Washington" airs TONIGHT.)

2.) Here’s a preview clip of Mariah singing – ironically – “One Child” …

3.) So, you say you don't know what to get the goat on your Christmas list? Well, how 'bout a copy of Mariah's "All I Want For Christmas Is You". A British farmer tells Britain's "Express" that his goats have been giving loads more milk since they've been exposed to a steady diet of Mimi's contemporary Christmas classic.

DIVORCE DRAMA: 1.) "E! Online" is sticking to their report that “Green Lantern” co-star BLAKE LIVELY is responsible for the SCARLETT JOHANNSON/RYAN REYNOLDS breakup ... but they’re saying it was never anything more than just a hookup.

It was, they say, what those in the business call a “locationship”. That’s the term used to describe an affair between two stars filming a movie on location (--Think BRAD PITT and ANGELINA JOLIE) Scarlett being the one wanting to end to the marriage, has only added fuel to the rumor.

She, by the way, is currently on vacation with friends in Jamaica …

2.) EVA LONGORIA and TONY PARKER were spotted doing lunch together again. This time at a Rudy’s Country Store in San Antonio. But don’t get too excited for them. It doesn’t look like the divorce is on hold or being called off.

Said a Rudy’s employee, “They looked like they were best friends. Nothing of a romantic nature.” A source supposedly close to Eva confirmed to E! it was not a lovey dovey thing. “There is no reconciliation,” blabbed the pal. Reps for either will neither confirm nor deny. 

IN DENIAL:  You won't have to get  NICK LACHEY and VANESSA MINNILLO a wedding present this New Year's Eve after all. After Nick hinted a couple of days ago  on "The Rachel Ray" show that they might marry on New Year's Eve while in Tuscany, Vanessa has come forward to deny it and set the record straight. She tells "Hollyscoop", "(Nick) was joking. We're not getting married in Italy."  She adds they still don't know where or when she'll make an honest man out of him.  

Speaking of  The Rachel Ray Show ... KIM KARDASHIAN  told Rachel on the show yesterday she's quitting men! Kim said she plans to remain single throughout 2011.

Yeah, she doesn't believe it either: "I don't think that's going to last, because that's just how I am."

VIDEO: DIDDY was celebrating the release of his new C.D. at a New York City hotel earlier this week and the HIGHLIGHT of the night had to be when a "model" HAD HER HAIR CATCH FIRE!!!  The "model" was sitting in a bathtub, surrounded by candles,when she gets a little too close to the flame ...

QUOTE/UNQUOTE: "It's going to be a long, slow burn for me.  I'm not rushing into anything." -- JAKE GYLLENHAAL  in a new interview with "USA Today" about taking things slow with TAYLOR SWIFT. Uh-oh. Get ready for Taylor's new song: "Hey Guy I Won't Name, Why Did You Take Things So Slow and Hurt Me Like That?"