BEYONCE AND JAY-Z OFFICIALLY ANNOUNCE BLUE'S ARRIVAL: BEYONCE AND JAY-Z have "officially" welcomed their baby daughter, Blue Ivy, to the world. It's the family's first public announcement regarding the birth and reveals that she was delivered naturally, instead of reports that claimed she was born via c-section.

"Hello Hello Baby Blue!" read the note from couple. "We are happy to announce the arrival of our beautiful daughter, Blue Ivy Carter, born on Saturday, January 7, 2012. Her birth was emotional and extremely peaceful, we are in heaven."

The statement continues, "She was delivered naturally at a healthy 7 lbs and it was the best experience of both of our lives. We are thankful to everyone for all your prayers, well wishes, love and support."

On a related note ... Beyonce’s personal friends made it a point to congratulate her, but NOT former Destiny’s Child group member Michelle Williams.

“Let's get ONE thing straight," she tweeted, "I do NOT have to say congrats to someone when they're NOT on twitter...ESPECIALLY when I talk or email them all the time....My friendship with people aren't always for twitter display. Respect that and get a LIFE!!!" Sounds like it’s a sensitive subject, huh?

JAY-Z RAPS ABOUT 'GLORY' OF BLUE'S BIRTH: Blue Ivy isn't even a week old and she's already featured on a track. Proud pappa Jay-Z has written a song about her, and not only is she credited on the track, she's even heard crying at the end. (--Click here to listen.)

In the song, Jay says that the baby girl was conceived in Paris, and reveals that the couple suffered a miscarriage. He sings, "Last time the miscarriage was tragic / We was afraid you'd disappear but nah baby you're magic."

By the way … Bay and Z aren’t the only celebs who’ve named their kid some form of blue. Cher has a son named Elijah Blue Allman, John Travolta's daughter is named Ella Bleu Travolta, Bret Michaels has a daughter named Jorja Bleu, Alicia Silverstone named her son Bear Blu, and Maria Bello's son is named Jackson Blue

BREASTFEEDING MOMS CONSIDER LAWSUIT OVER BEYONCE BABY DRAMA: According to TMZ, other new moms at the hospital Blue Ivy was born have been complaining about how they are being treated now that the superstars' offspring has arrived.

Sources say that mothers who have been taking a breastfeeding class at the hospital have been discussing how they've been "neglected" by staff, and are thinking about filing a lawsuit. The mothers are reportedly not mad at the stars, but at the people who run the hospital.

Lenox Hill is denying they gave the couple special treatment. "The suggestion that the couple paid $1.3 million to rent an entire maternity floor is simply not true,” read a statement from the hospital. The facility did confirm that Beyonce had their own personal security on hand at the hospital, but says they were in charge of controlling the management of security, and insist they made “every effort” to keep the disruption of other patients to a minimum.

KATY PERRY PULLS OUT OF PEOPLE'S CHOICE AWARDS: KATY PERRY evidently plans to stay out of the spotlight a while longer. Perry abruptly pulled out of tomorrow's People's Choice Awards, where she was set to make her first major public appearance since news of her split from RUSSELL BRAND broke.

Katy disappointed us all via Twitter yesterday. "Unfortunately I will not be able to attend the People's Choice Awards," she tweeted. "I want to thank you all for voting for me, fingers crossed!"

RELATIONSHIP REPORT - DOES DEMI MOORE HAVE A NEW MAN???: Radar Online, which posted this shot of DEMI MOORE getting out of an SUV driven by an unidentified man and then getting into her own car on Saturday, is implying that the mystery man is Demi’s new hunk of man meat.

So is he Demi's new boy toy, or nothing more than an assistant/driver? Don't look at me, I dunno! That’s why I’m asking you!

COULD BE TRUE COULD BE CRAP - GAGA MOVING IN WITH BOYFREIND: Things are apparently heating up between LADY GAGA and boyfriend TAYLOR KINNEY. If you’re to believe the rarely-if-ever-reliable Britain's Sun, that is. The tab claims the pair is looking into not one but two new pads together.

A source allegedly close to Gaga says, quote, "They've been looking for two places -- one near his parents in Pennsylvania and one in the Big Apple."

PINK SHOWS US HER TWEETS - CELEBRATES SIX YEARS OF MARRIAGE: Usually we're reporting break ups and divorces in Hollywood, so it's nice to be able to celebrate some marriages that are working out. Such as PINK and her hubby Carey Hart's, who are celebrating six years of marriage!

Hart wrote, "Happy anniversary to my beautiful wife who i love so much. 6 amazing years and you haven't killed me yet. Ill love you forever."

To which Pink tweeted back: "yes, I haven't killed you yet;) but give it time darling. It's happening slowly haha. I love you honey cakes."

CELEBRITY CUTIE PATOOTIE - LEANN RIMES IN HER TINIEST BIKINI YET!!!: Last week LEANN RIMES was on a beach in Hawaii wearing a tiny bikini.

Over the weekend, she was out in the smallest bikini yet! I swear they just keep getting skimpier. I’m not complaining, I’m just sayin’.