Jay-Z made a grand entrance in NYC like only a music mogul should ... by arriving via helicopter holding his adorable 7-month-old baby daughter Blue Ivy on Thursday.

Rockin' what's sure to be the most have accessory for every A-list tot in the biz, little Blue Ivy wore baby blue noise blockers to protect her ears.

Move over Tom and Suri, there's a new extravagant father/daughter team taking over the town.

Michelle Williams wants to make one thing clear -- babysitting for Beyonce's baby girl is just a part-time gig ... because she's not the only Destiny's Child singer doing diaper duty for Blue Ivy.

Last night in NYC, Michelle revealed Kelly Rowland also pulled a shift watching B.I. in Beyonce's hotel suite ... during B's concert in Atlantic City last weekend.

In the middle of the show, Beyonce thanked Michelle for babysitting -- but Michelle 'fessed up to us she had some help ... and even got to go downstairs to see some of the show.

Music royalty for parents AND smoking hot nannies? Blue Ivy wins again.

With a covered up three-month-old baby Blue Ivy attached to her chest, Beyonce and Jay-Z emerged from a yacht in the Caribbean this weekend.

Look ma, I'm on a boat.

Who killed JFK? Where's Hoffa buried? Did Beyonce really give birth? Mysteries that may never be solved! Except she totally had that baby -- though she IS oddly thin already. Hmm ...

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Jay-Z and Beyonce carried a heavily bundled baby Blue Ivy out into the world for the first time ... hitting up Sant Ambroeus in the West Village for a little lunch today.

You need to crawl before you ball.

This is what the heir to a hip-hop fortune looks like ...

Beyonce and Jay Z have finally posted photos of Blue Ivy Carter .. which appear to have been taken at their pimped out suite at Lenox Hill Hospital in NYC.

The Carters posted a note along with the pics which reads, "We welcome you to share in our joy."

Blue Ivy was born on January 7th.

It appears Beyonce color coordinated for the shoot with Blue Ivy ... check out her blue fingernail polish.

Beyonce and Jay-Z's baby Blue Ivy isn't just the youngest person to appear on the Billboard charts -- she's also the youngest person to have her own strain of marijuana named after her.

TMZ has learned, multiple weed dispensaries in Hollywood are cashing in on hip hop's baby princess ... by selling a new strain of marijuana called "OG Blue Ivy."

Obviously Bee and Hova didn't sign off on the new strain  -- but so far, none of the dispensaries have received any sort of legal notice from the couple.

99 problems, but a kush ain't one.

The lavish hospital executive suite where Beyonce gave birth is a lot cheaper than you think ... at least it's a lot cheaper than we thought.

An official at Lenox Hill Hospital in NYC tells TMZ ... there are 7 suites in the VIP section where Beyonce gave birth. Each executive suite costs between $700 and $800 a night. 

We're told the suites have "reconfigurable designs." Translation -- the dividing walls are movable so the VIPs can expand into more than one suite. 

In Beyonce's case, the official wouldn't be specific, but we're told she had at least 4 suites -- which could explain the 4 flat-screen TVs. So Beyonce probably paid $3,200 a night -- she can afford it.

We're told any patient can use the rooms, provided it satisfies the needs and treatment of the patient.

The official indicated there has been intense interest in the suites, repeatedly telling us patients can book them subject to availability.

Lenox Hill Hospital constructed a suite for VIPs which looks like a Four Seasons penthouse ... and the room was christened Saturday when Beyonce gave birth.

TMZ has obtained photos of the room where Blue Ivy came into this world, and it's baller. There are 4 flat screen TV's, state of the art electronics, a kitchenette, nice art, mahogany walls and plush furnishings. And take a look at the bed where Jay Z got some shut eye!

Sources connected with the hospital tell TMZ ... the suite was not constructed specifically for Beyonce, but it was always intended that Beyonce would be the first patient to use it.

The NY State Health Department is investigating complaints from new parents who claim they were mistreated by the staff at Lenox Hill Hospital while Beyonce was giving birth in the VIP room.

TMZ broke the story ... several parents are considering filing a lawsuit against LHH -- claiming they were neglected by staff and prevented from visiting their newborns ... due to the drama surrounding the superstar.

Now, a rep for the Health Dept. tells the NY Daily News, "Whenever we receive a complaint, we look into it. It’s not necessarily an investigation. It could be a review. Most likely in this case, it would be an investigation.”

It's unclear how many parents complained -- but as we previously reported, a whole bunch of people were griping about the situation during a breastfeeding class a few days ago.


5:49 PM PST -- The NY Health Dept. has announced it has reviewed and DISMISSED the complaints filed against the hospital.

However, a spokesperson for Lenox says the hospital will conduct its own internal investigation into allegations about the mistreatment of maternity patients.

Beyonce's new baby Blue Ivy Carter is the devil incarnate -- this according to some heartless vandal who defaced the sign in front of a North Carolina church yesterday ... writing, "Beyonce had her baby. Satan is on Earth."

The pastor at Beulah Hill Baptist Church in West End, NC tells TMZ, he discovered the vandalism yesterday after receiving numerous complaints from locals -- and removed it immediately.

The pastor insists, the church had nothing to do with the apocalyptic message ... it was simply the victim in a random act of mischief.

Blue -- Satan? No. Illuminati? ALMOST DEFINITELY.


2:35 PM PT: The pastor did an interview with local news today denying the claims he made to TMZ -- but we assure you 100%, the pastor made the claims in question ... and we continue to stand by our story.