Hollywood Dirt: Celebs Get In on April Fool’s Day Fun + Photos of Khloe Kardashian’s Wardrobe Mishap & More

LINDSAY LOHAN, SHARON OSBOURNE AND MILA KUNIS ARE NOT PREGNANT, SNOOKI DID NOT GET MARRIED AND LADY GAGA WILL NOT BE IN THE NEW 'X-MEN' MOVIE: The World Wide Web of Celebrity Hoaxes was working overtime yesterday pulling all kinds of April Fool's pranks.

--SNOOKI announced on Twitter that she and her baby-daddy eloped. The poorly-Photoshopped picture she posted as proof, though, was a dead giveaway that it was all a joke.

--A MILA KUNIS fan page posted that she and ASHTON KUTCHER are expecting. They're not.

--JUSTIN BIEBER Tweeted a phone number that was supposedly his, and said he was taking calls from his fans. He wasn't. The number was actually TMZ's toll-free tip line. And since the number is toll-free, TMZ will be stuck with the bill.

--"X-Men" director Bryan Singer hit up Twitter with news that LADY GAGA had been cast to play a mutant named Dazzler in the next movie. She hasn't.

--LINDSAY LOHAN Tweeted "It's official. Pregnant" late yesterday afternoon. No 'April Fools' type followup from her yet, but given the wild partying she was doing over the weekend in Brazil, it's doubtful she really is.

And finally ...

SHARON OSBOURNE returned to "The Talk" yesterday after being gone for two weeks and announced that she went to Germany to get in vitro fertilization, had it implanted in her 60-year-old womb, and that she was pregnant. She's not.

IS LAMAR ODOM'S CHARITY A SCAM?!: KHLOE KARDASHIAN and her man LAMAR ODOM are under fire for an alleged charity scam involving Cathy’s Kids, a foundation for cancer research he set up after losing his mother to cancer in 2004.

An investigation of tax records by ESPN shows that not a cent has gone to cancer, but rather financed, quote, “two elite youth basketball travel teams.” The ball players got $1.3 million of the $2.2 million raised, with another chunk of the charity cash going into the bank account of the charity's secretary Jerry DeGregorio. DeGregorio was Odom's high school basketball coach and best man at his wedding to Kardashian.

According to ESPN ... the organization's tax return showed a debt of $256,000 in 2011, and although  supposedly inactive and no longer fundraising, Khloe has been busy selling her used clothing and accessories on eBay all in the name of Cathy's Kids. Neither Lamar, Khloe, nor any of the couple's reps have made themselves available for comment.

CELEBRITY WARDROBE MISHAPS: Did the wind cause KHLOE KARDASHIAN to flash her baby maker? We Report, You Decide! (PHOTO) (PHOTO)

KIM KARDASHIAN NOT THE NEXT MERYL STREEP: Critics are harshly criticizing KIM KARDASHIAN'S acting performance in TYLER PERRY'S new movie.

Kim appears briefly in a handful of scenes as an office assistant, and apparently, failed to channel the same convincing performance as she did that one time, when she claimed with a straight face her sex tape was leaked "accidentally." Here are some of the meanest things critics said about her acting:

--“Kim Kardashian, as nasal and awful an actress as you might imagine.”

-- “.. coworker Ava is played by Kim Kardashian, a true feat of stunt casting that’s only made all the more impressive by her inability to inject the slightest bit of emotion into her steady stream of insults.”

--“What alarms me more than anything … is the casting of Kim Kardashian in the film. Really? Say what you will about Perry’s movies, but … he usually casts his films carefully and well. This is hard to fathom.”

HEIDI KLUM SAVES  SON FROM DROWING: HEIDI KLUM'S Easter almost turned tragic Sunday. While vacationing in Oahu, Hawaii, her seven-year-old son, Henry, and one of his nannies were swept away in a large riptide. That's when Heidi and her bodyguard boyfriend, Martin Kristen, sprang to action and saved the two from drowning.

The Project Runway host tells Us Weekly, "We got pulled into the ocean by a big wave. Of course, as a mother, I was very scared for my child and everyone else in the water. Henry is a strong swimmer and was able to swim back to land. We were able to get everyone out safely."

JUSTIN BIEBER GETS BANNED FROM ANOTHER CLUB: JUSTIN BIEBER got himself booted from yet another nightclub over the weekend -- this time because his bodyguards flipped out and started smashing the phones of fellow partiers in Vienna, Austria.

The Bieb was in town to perform at an arena nearby, but decided he needed to let off a little steam at a place called The Passage. Justin's goons apparently thought some folks were getting a little too close, so they sprang into action and cleared some space -- allegedly groping a few gals in the process. Club manager Joachim Bankel tells the Austrian Times, “Justin Bieber is no longer welcome here.”

COULD BE TRUE, COULD BE CRAP - DOES AMY POEHLER HAVE A NEW MAN?!: AMY POEHLER is apparently already moving on from estranged hubby Will Arnett -- she was spotted out in L.A. on Friday night with comedian Nick Kroll.

A source tells the New York Post that the two were looking "cozy" at a restaurant on Sunset Boulevard, and that pretty much nobody in the place even recognized them. The Post adds that this apparently wasn't a first date. Amy and Will separated in September.