Britney faking pregnancy??

This is a must read from MSN. Britney is in another world.

Still reeling from those tabloid tales of Britney Spears' purported plans to adopt twins? Then you'd better grab a double dose of Dramamine, because you're gonna feel woozy after getting a gander at the latest cover of In Touch.

"Yes, she's pregnant!" the mag terrifyingly declares. "Ultrasounds, her excited e-mails to friends -- now the father of Britney's third child confirms it's true."

(That sound you hear is either your brain melting or the approaching hoofbeats of the Four Horsemen of the Apocalypse. Your call.)

The kicker, according to a source, is that Sean Preston and Jayden James' court-monitored mess of a mommy "won't be happy unless it's a girl."

The supposed daddy-to-be? Music producer and onetime Spears paramour J.R. Rotem, who is quoted as saying of the spawn speculation, "It's true."

While it's unclear whether Rotem was laughing, winking and making a "gotcha" gesture when he allegedly said this, the mag claims Brit e-mailed her ultrasound to pals on Nov. 16.

And it turns out In Touch isn't the only outlet with sources deep inside Britney's uterus.

Star also jumps on the stork bandwagon, offering up -- amid ooky talk of how she allegedly has an X-rated "Fantasy Room" and poop-stained furniture (courtesy of her sons and pets) that we'll spare you from hearing -- a purported MySpace posting as proof.

"Yes, I am pregnant and I am shocked -- almost four weeks to be exact," the tab (via the New York Daily News) claims she wrote in a message. "I don't really know if I'm happy or sad I'm just ... idk [I don't know] I am happy I guess. I saw the ultrasound and it was really kewl!"

Thankfully, there appears to be no reason to panic just yet. Spears' suctioned-on BFF Sam Lutfi tapped out a text to Ryan Seacrest Wednesday morning refuting the bun-in-the-oven rumblings.

"It's BS," he wrote. "Don't know who made it up. J.R. doesn't even know what's up. It's fake. Completely fake."

For good measure, Lutfi also sent a message to People, calling the baby talk a "big lie."

Britney "laughed at it," he says, adding that she probably won't address the story directly because "if she were to give a statement about every lie, she'd be giving statements forever."

(And that just wouldn't be "kewl.")

Lutfi issued the denials shortly after he and Britney finished an all-night video shoot for "Piece of Me," the second single off her rapidly fizzling album "Blackout."

But did the gruesome twosome leave a miffed cast and crew in their wake?

Us Weekly reports the responsibility-rejecting pop calamity showed up 12 hours late for the shoot, which took place at Los Angeles hot spot Social.

Brit was supposedly due on-set early Tuesday morning, but didn't leave her house until after 7 p.m., when Kevin Federline's bodyguards fetched Sean and Jayden.

"I've been there since 3 p.m. and have not shot a thing!" grumbled a dancer to the mag. "I finally finagled my way out. It's all very unorganized. They are calling in more people for late night."

Insiders snitch to TMZ.com that Brit's tardiness was due in part to Kevin's reluctance to alter their existing custody schedule. Seems she wanted him to swap days so she could shoot the video (reportedly already postponed three times), but Federline, "fed up" over his ex's constant visitation changes, nixed the idea.

From the sound of it, however, Britney's presence didn't seem all that crucial to filming.

A set source tells Us she used a "body double to shoot all the scenes that don't require her face."

The video's concept was quite the acting stretch for Spears, who was snapped on-set surrounded by a cast of blond-wigged, trench-coated clones.

"The paparazzi are following her, so they're dressed alike to trick them," a spy explains to People. "They all go into a club to get away. One [photographer] sneaks in, but Britney, in the end, discovers him."

It certainly sounds more compelling than her "Gimme More" video, a slap-dash, quick-cut, widely derided affair pieced together from shots of the Britster flailing around a stripper pole in a skimpy outfit.

"[Spears] is really freaked out about everything," the insider fesses up to People. "She's just really nervous and feels like everyone might make fun of her again."

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