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Jennifer Lopez's ex-boyfriend -- who she dated for nearly a decade -- has died ... TMZ has learned.

J Lo's high school sweetheart, David Cruz, died Saturday in Mount Sinai West Hospital in Manhattan ... this according to the NYC Medical Examiner's Office. We're told David died of heart disease -- no other info was immediately available.

Jennifer and David got together when she was just 15 (he's only a year older than her, BTW) and they dated for about 10 years before calling it quits in the mid-'90s as J Lo's fame was skyrocketing.

David and Jennifer did attend a few events together back in the day -- when she wasn't well known -- they sure looked like a happy couple.

David's partner of 18 years, Isa, tells us, "He was kind and loving. He never held on to anything and was always very open. He was a devoted father, he helped raise his step-son who is now in the Marines. He loved the Yankees and Knicks. He loved going to the theatre with me. My favorite moment was family date night, because it wasn't just special for me but for the kids as well. He always made sure to end things with an 'I love you.'"

Jennifer's gone on to have super high profile relationships since then -- including dating Diddy, Ben Affleck, Casper Smart, Drake, Marc Anthony (whom she married) and now ... Alex Rodriguez, to whom she's currently engaged.

David was 51.

Hundreds of thousands of folks are outta work due to the coronavirus pandemic ... and even smoking hot girls who get paid for social media posts are feeling the pinch.

Abigail Ratchford, who has a legion of 9 million Instagram followers, tells TMZ ... her IG sales are grinding to a halt amid the outbreak, which is alarming considering she's used to making around $500,000 a year from sponsored IG posts endorsing products, paid shoutouts and merchandise.

AR says she still has monthly deals that require her to post and keep some cash flowing in, but she's gotta get creative to produce content because she can't call on makeup artists, hair stylists and photographers due to Cali's "Safer at Home" order. Now, she's a one-woman band.

There is a sliver of hope for the self-proclaimed "Queen of Curves" ... Abigail says other IG models are paying her for shoutouts to drive traffic to their pages, and it could continue because it's harder than ever to bring in new followers.

The outlook is much worse for Ella Rose and her 811,000 IG followers. Ella, who is Julian Edelman's baby mama, tells us she hasn't had any new ad inquiries since last week, and she's used to getting a few daily pitches from companies asking to pay her for tagged posts.

Ella says she had 2 shoots scheduled this week, but the photographers both canceled. Now, she's using a timer to shoot her own content.

Another IG model with over 2 million followers tells TMZ ... a lot of her prepaid posts are being put on ice, because some of the products were from China and the companies are worried about backlash and insensitivity surrounding COVID-19.

What's more, she says a lot of her long-term contracts are ending in the next couple weeks, and companies want to wait until April to renegotiate.

Desiree Schlotz, who has 423K IG followers, tells TMZ ... things are pretty tough right now, and it's hard to get content when you're limited to only shooting inside your house, though it's forcing her to be more creative and think outside the box.

Desiree says she's had brands back out of working with her because of the sensitive nature of the coronavirus climate, and other people are delaying payments or scrapping plans for paid posts because everyone is losing work.

Bottom line ... pretty much every Instagram model is as worried about the future as the typical American worker. Tough times, indeed.

Kim Kardashian West isn't the only one finding random lobsters hanging out on local pavements in the midst of the coronavirus ... another one of the mysterious creatures just popped up on the sidewalk in Ohio.

Kim was shocked to find a lobster -- most likely crawfish -- near her home in Hidden Hills earlier this week. It's unclear just how the crustacean got there, as they spend almost all of their time in the water ... but it was certainly a sight to see.

We thought the strange sighting ended there until a friend of one of our staffers found ANOTHER one of the animals cruising a sidewalk in Ohio ... though it was much smaller than Kim K's.

The Ohio crustacean was found near a golf course, so it's possible it made the long journey out of a pond. However, we're told employees at the course had never seen one out like that.

Then again -- the biz is hurting so bad -- maybe restaurants are just letting their extra produce loose.

Tekashi 6ix9nine is so desperate to escape the coronavirus he'd rather take his chances outside of prison than risk the disease killing him while he's locked up.

6ix9ine's attorney, Lance Lazzaro, wrote a letter to the judge Sunday night citing serious concerns for Tekashi's wellbeing behind bars. Lazzaro says Tekashi suffers from asthma -- making catching coronavirus that much more serious -- and he wants him out ASAP.

In the letter -- obtained by TMZ -- Lazzaro also reveals Tekashi was diagnosed with bronchitis and sinusitis late last year and was hospitalized for treatment.

According to Lazzaro, the rapper has recently had shortness of breath, but prison officials won't let him see a doctor.

Tekashi has only a few months left of his 24-month sentence ... but Lazzaro says Tekashi can't risk staying locked up any longer ... his life is on the line.

Future's alleged baby mama is bringing receipts in the lawsuit the rapper brought against her ... calling his invasion of privacy suit laughable 'cause his tea's been spilled PLENTY of times.

Eliza Seraphin filed legal docs and laid out bullet point after bullet point why she thinks Future's lawsuit should be dismissed. In docs, obtained by TMZ, Eliza says Future's argument -- that had he known Eliza would kiss and tell he would have never slept with her -- is BS.

She says, for starters, if Future didn't wanna get caught up in a paternity case he should have wrapped it up. But, he didn't ... triggering his SEVENTH case of baby mama drama.

And, speaking of baby mama drama ... Eliza claims Future can't call airing his dirty laundry through a paternity case invasion of privacy because his sexual relations with a bunch of other women with whom he's fathered kids with "are all documented and widely reported on the internet and discussed on social media. It is unknown why he would think this one would be any different." Boom.

Eliza wasn't done yet. She also said if Future didn't want her talking about their sex life, he should have just taken a paternity test. She says a hookup that results in the birth of a child is not a private matter when the mother's "had to resort to the court system because the child's father refuses to acknowledge paternity."

According to docs, Future complains about Eliza's allegations that he's the biological father of her 11-month old daughter but, she says, "it should be noted that while [Future] has not admitted to being the child's father, he has not actually denied it either."

Problem for Eliza is ... her motion was TOO LONG cause the judge denied it on a technicality ... turns out her motion exceeded the page limit. But, she can try to refile a shorter version or ask for a page-limit extension down the road.

Jon Bon Jovi has a fun way to pass the time and connect with your fellow Americans -- let's write a song together!!!

Jon has recorded the first verse of a song he calls, "Do What You Can." The inspiration for the title came to him last week when he was chipping in at the JBJ Soul Kitchen in Red Bank, New Jersey. He was washing dishes -- something volunteers often do at the restaurant -- when someone snapped a pic of him. Jon got the pic and the idea to caption it, "If you can't do what you do, do what you can."

Jon is now asking everyone to join in and finish the song. Come up with a lyric and he'll look at the submissions and construct the tune.

The idea behind this ... we're all going through it together, so let's learn how to work together as well.

Logan Paul tells TMZ Sports the Antonio Brown fight is officially dead ... and says his message to the NFL star after getting the news was simple -- 'I'm sorry you're a bitch."

Paul and AB had been hot and heavy in talks to get into a boxing ring later this year ... with DAZN officials even getting involved to try to promote the fight.

In fact, the two came face-to-face at a Super Bowl party in Miami last month ... and it seemed everything was pointing toward a mega-event.

But, Paul told us just a few weeks ago talks had broken down following Brown's arrest for allegedly attacking a moving truck driver ... and when we got the YouTube star at Il Pastaio over the weekend, he told us the fight is now officially off.

"It's not happening," Paul said. "He DM'd me, and he said something like, 'I'm expecting a national apology.' And I said, 'I'm sorry you're a bitch.'"

Paul added, "I really am. That dude needs help."

Idris Elba contracting the coronavirus meant several members of his movie crew had to quarantine like he did, but they're pissed about how producers handled the crisis.

As we reported, Idris revealed Monday he tested positive for COVID-19, but actually went into isolation on March 13 when he discovered he'd been in contact with someone who had the virus -- possibly Justin Trudeau's wife -- during a March 4 event in London.

The bigger problem, though -- the actor spent the next several days after that event in Sante Fe, New Mexico rehearsing with his costars and crew members for the upcoming Netflix flick, "The Harder They Fall."

So, if Idris really did contract it in London ... he would've unwittingly exposed some people on set. Sources close to production tell TMZ ... filming was halted last Friday, and the crew was told it was due to growing fears over the pandemic. We're told there was no mention Idris was getting tested.

As for why they're concerned -- we're told Idris had some direct contact with members of the stunt team during rehearsals ... part of which took place in a small cabin.

Yet, our sources say nobody was informed them Idris tested positive until the actor revealed it himself on March 16.

That same day, we're told some of the crew traveled home -- possibly exposing even more people -- but other crew members chose to stay and self-quarantine ... and they're still there. Idris is also still self-quarantining at a house on location, while the crew remains at a hotel in Santa Fe.

No one's peeved about the housing situation ... it's more the lack of communication about potential risks following the news about Idris' positive test.

We're told, as of Friday, no one who worked on the film has been tested, and many people feel more should be done to protect them or give them some peace of mind.

Of course, the shortage of COVID-19 tests has been a major issue nationwide, but if that's the case ... our sources say production or higher-ups at Netflix should be conveying that, but so far they've been silent.

Once wasn't enough for Alex Volkanovski ... the UFC champion wants to beat Max Holloway TWICE, and establish himself as the GREATEST featherweight fighter EVER!!

Volkanovski snatched Holloway's belt in a close fight back in December ... so when the new champ recently came by the TMZ office, we asked him who he wants to scrap with next.

Alex was crystal clear ... he wants to run it back with "Blessed," 'cause Holloway's the biggest threat and best fighter (besides himself, of course) in the 145 lb. division.

"I want that fight [with Max], cause there's no clear #1 contenders, and I just think that he's a great champion. And, for me, the biggest fight in my career right now to solidify myself as the best featherweight of all-time, and one of the greatest of all-time," Alex says.

"I go and take out Max twice in [his] prime, ya know, people are gonna give me the respect I deserve."

Volkanovski's already got a helluva resume ... he's got a pro record of 21-1 and hasn't lost since 2013 -- nearly 7 years ago.

As for when the rematch would go down ... Alex broke his hand during the Holloway fight, but says he was just cleared for combat, and he's ready to rock ... and he already has a date circled on the calendar.

"I don't want to sit on the sidelines too long, and I wanna defend my belt in Australia. That Perth card is June 6. We're gonna make it happen, I reckon."

A Tom Brady swap for Jameis Winston in New England?!?!

Donovan McNabb is all for that ... the legendary NFL QB tells TMZ Sports he thinks Jameis is the perfect replacement for TB12 in Foxborough.

"I think he would kind of flourish in the New England offense," McNabb says.

As for why ... Donovan tells us he thinks Josh McDaniels and Bill Belichick could finally get Winston to stop throwing interceptions -- something the ex-Bucs QB did 30 TIMES last season.

"It'd be more dink-and-dunk, protect the football," McNabb tells us, "and all a sudden, we're talking about New England again possibly winning the AFC East."

The signing wouldn't be all that crazy ... Winston is likely open to a team-friendly deal now that most QB-needy teams are full -- and the Pats certainly could use his talent level on their depleted QB roster.