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Single life agrees with Wendy Williams ... and it also keeps her up into the early morning partying with hip-hop superstars like Rick Ross and Meek Mill.

Wendy was front and center at Villain in Brooklyn Thursday night where Rick was celebrating his new album, "Port of Miami 2." The Boss and the talk show host got cozy for some pics, and the whole crew raised their glasses and some cigars all night.

Looks like Wendy got plenty of tea for her show's return in September ... she had some deep convos with Rick and Meek.

Busta Rhymes, Lil Mama and Rick's mom, Tommie Roberts, were also partying.

You might recall, Wendy's ex, Kevin Hunter, claimed she never wanted to be out on the scene when they were together. Well, our sources in Brooklyn tell us Wendy was still hanging with Rick and co. when they finally left the venue shortly after 1:30 AM.

Mystikal took a terrible fall during a concert Thursday night in Tampa ... it was so bad his concert got cut short by more than half and he couldn't walk off the stage without a major assist.

The rapper ran onstage at around 1 AM and within 30 seconds just at it ... he tumbled offstage to the floor below. Security helped him back up, but he was clearly injured and in pain.

He spent the next 45 minutes grimacing in pain as he sat on the edge of the stage ... unable to stand. At times he scooted a few feet, but that was it.

A concertgoer tells us, it was obvious to all something was seriously wrong, as Mystikal repeatedly said, "Man, I need an ambulance."

He finally pulled the plug as members of his crew helped him offstage without putting weight on the injured leg.

It's unclear if he went to the hospital.

We didn't really get a good look at Kanye West's prototype homes -- the ones that have become the target of L.A. County government -- but we just got these up-close pics, and they're pretty cool.

TMZ broke the story ... Kanye was creating prototypes for new age housing ... housing that blurs the line between low, middle and high-income communities. He built the 4 dome-like structures on the 300 acres he owns in Calabasas, and his plan was to create a full housing complex on the site. Problem is ... the structures may have run afoul of L.A. building code.

As we reported, Ye and co. didn't get building permits, which must be pulled before construction unless the structures are temporary. After 2 visits, the inspector from the L.A. County Dept. of Public Works determined the structures were not temporary and Kanye now has until Sept. 15 to either get permits or tear the domes down.

In addition to bridging the income gap, Kanye wanted to reimagine the concept of space and make more efficient dwellings for the future.

What do you get a guy for his birthday when his name literally reminds you of moneybags? If you're Kanye West ... you go big, black and Italian.

Ye blew the doors off all birthday surprises when he showed up to his former manager John Monopoly's party at Delilah in WeHo Wednesday night with a brand new luxury ride fresh off the lot -- a customized 2019 Lamborghini SUV.

John told us the gift was from a "very good guy" and brother of his with whom he goes back 30 years. He's coy about it, never dropping a name, but it was pretty easy to figure out. Monopoly discovered West and served as his manager for his first 3 albums.

We also got a pic of Kanye after he made the special delivery to confirm the poorly kept secret.

We're told the customized SUV with the matte-black paint job goes for around $300k ... and John says he didn't even see it coming.

BTW -- Monopoly's bday bash was also a lot of fun on the inside of the club in the private VIP section. Along with Kanye, we're told rapper Cam'ron, fashion designer Don C and Jacob York were there.

Willie Nelson worried his fans when he abruptly canceled his tour due to a "breathing problem," but the singer's only taking a temporary break and will return soon ... TMZ has learned.

Willie's rep tells us his tour schedule is typically 2 weeks on, 2 weeks off, but his recent medical issue -- which they believe is linked to his history of emphysema -- is requiring a little extra R&R this time.

We're told he's only officially canceled the next 6 stops on his tour ... but plans to return to the stage September 6 in Gilford, NH and continue on with the 20+ shows scheduled after that.

As for the breathing problem ... Nelson's rep says it was not a medical emergency and he wasn't rushed to the hospital or anything like that. He just needed rest and is back in Texas to see a doctor.

We're told he's currently taking it easy and already feeling better.

Willie's 86, though, and this isn't the first time he's had to cancel some shows due to his health. He missed the Outlaw Music Festival last summer and had to cancel some dates earlier in 2018.

Mike Posner's epic trek across the country is derailed thanks to a rattlesnake bite so bad he had to be airlifted to a hospital to save his life.

The singer-songwriter was making his way across Colorado Wednesday and had already racked up 16 miles on the day with a goal of 8 more when he got bit by a baby rattler. We're told the snake jumped out of nowhere on his path and sunk its fangs into his left leg.

According to Mike, "That venom is no joke!"

This pic of his feet shows where the venom caused swelling from the bite on the ankle -- pretty gnarly.

Fortunately, he says he got to the hospital and received the anti-venom in time, courtesy of an emergency helicopter ride and the expert staff -- but he'll be laid up for a few days and won't be able to continue his walk for several weeks.

On the bright side, Posner says he's enjoying the hospital's AC and a nice bed ... which he hasn't had in quite a long time. He vows to get back on "The Walk" as soon as he's able, though.

We had Mike on "TMZ Live" in April and he broke down the purpose of his journey, which was inspired by the deaths of his father and Avicii. He started on April 15 in New Jersey, and hoped to make it to Venice, CA by October.

He's releasing new music along the way whenever he crosses a state line ... most recently, “Prince Akeem” ft. Wiz Khalifa as he got to Colorado.

The bite is definitely a setback, but Mike insists a lil ol' snake isn't gonna stop him.

The Jonas Brothers are back on the road, picking up where they left off nearly 6 years ago when they abruptly split -- but there are a few very attractive changes this time around.

Nick, Joe and Kevin Jonas finally kicked off their highly anticipated Happiness Begins tour Wednesday night in Miami. The trio's set blended new and old school -- from "Cool" and "Rollercoaster" to "Fly With Me," "Love Bug" and, of course, "Year 3000."

The wives also brought their talents to Miami. Priyanka Chopra, Danielle Jonas and Sophie Turner all proudly posed in front of a "J-Sisters" backdrop while rocking JoBros gear. We're guessing they had premium seating to soak up all the preshow chants of "JONAS! JONAS! JONAS!" inside the packed AmericanAirlines Arena.

Daddy Yankee, Jordan McGraw and Bebe Rexha also made appearances but the spotlight belonged to the bros -- who came out for an encore and performed their smash hit, "Sucker."

The trio and their ladies are traveling with their furry family members as well. Between Sophie, Joe, and Priyanka having extra friendly travel companions, it's a pretty packed flight.

Ray J is making bank to get people to invest in dank ... he just inked a lucrative deal to convince rich folk to bankroll legal marijuana startups.

Sources with knowledge of the deal tell TMZ ... Ray J is making $1 mil per year to get people to spend money on weed, as an executive for a cannabis crowdfunding company.

Ray J signed on to become the chief strategic media officer for MarijuanaStock.org ... and his new duties include making infomercials for the brand, encouraging people to invest in the burgeoning bud biz and enlightening potential investors on the possible high returns. Financially, that is.

Our sources say, the company sought out Ray J because he's super plugged into the legal weed biz ... and for his long Rolodex of celeb friends. In Ray's case, it's what he knows AND who he knows. Ray's manager, David Weintraub, tells us Ray was given full creative control for his new venture.

As we first reported ... Ray J recently became heavily involved in legal marijuana, pouring in $5 MILLION to join the green rush and get his own chronic company off the ground.

Now, Ray J is turning ganja into even more green.

Barbra Streisand and Ariana Grande blended classic and contemporary voices for one helluva surprise performance, and only 2 words come to mind -- like buttah!!!

The legendary singer was in the middle of performing Tuesday night at United Center in Chicago when, out of nowhere, Ariana -- who idolizes Babs, btw -- strolled onstage. Naturally, her surprise appearance drew a roaring ovation as they launched into Barbra's 1979 hit duet "No More Tears (Enough is Enough)." AG sang the legendary Donna Summer's part.

You can tell Ariana's THIS close to losing it herself from excitement. Her review of the performance was pretty simple -- she wrote on social media, "Best night of my life."

After exchanging pleasantries, Ariana cracked a joke, "I'm gonna go pass out now. You're just gonna find 10 pounds of hair."

The "7 Rings" singer later posted a picture with Barbra and captioned it, "Cherishing this moment forever." It seems Ariana decided to stick around in Chi-town after her Sunday performance at Lollapalooza.

Rita Ora's hot girl summer leaves very little to the imagination ... not that we think anyone's complaining.

The pop singer and actor's been enjoying the luxury lifestyle in Ibiza with friends this week, while her string bikini selections defy the laws of physics.

This one in particular -- a black 2-piece with a singular red star on the bottoms to match her nearby tattoo -- appears to be at least a couple sizes too small. Just the way Rita likes it.

Despite the barely-there swimwear, Ora doesn't seem to have any pause about taking a plunge into the sea ... wardrobe malfunctions be damned.

Inhibitions tend to be thrown to the wind when one's balling out on a yacht ... but Rita's next level.

P!nk's manager and crew are lucky to be alive after their private jet crash landed and burst into flames in Denmark hours after leaving her show in Norway.

The scary incident went down in the early hours Tuesday at the Aarhus Airport, when the plane apparently missed the runway and crashed into the turf beside it.

P!nk's manager and other members of her tour team were among the 10 aboard the Cessna 560XL. They were coming from her concert in Oslo Monday night, on their way to Denmark to prepare for her next tour stop.

Thankfully, everyone on the jet escaped without injuries. They were taken to a nearby hotel for the night. P!nk was not on the flight.

It's not yet known what caused the crash landing, but the plane reportedly caught fire as it was making its final descent at 12:38 AM. Danish air crash authorities are investigating.

Travis Barker's weekend was an emotional roller coaster in El Paso -- it started with plans to visit a friend in prison and then rock out with his band ... but his band ended up in lockdown across the street from the slaughter as he was miles away visiting a friend in prison.

As you know, a gunman with an assault rifle opened fire Saturday morning at a Walmart in El Paso, TX ... killing 22 and injuring many others.

Blink-182 was in town for a show, and Mark Hoppus tweeted they were about to head to the mall where the massacre took place when they got word their hotel was on lockdown.

Barker wasn't with the band ... he had traveled 250 miles to visit rapper 03 Greedo at the Fort Stockton prison.

We're told Travis promised his friend he'd visit him whenever he was in Texas and made plans in advance to see him before the Blink concert. We're told he was at the prison visiting Greedo at the time of the shooting ... but didn't get word of it until after he left.

Travis was horrified at the news, but thankful his bandmates and the crew were okay. Blink-182 postponed its show out of respect and to show solidarity with the community.

As for Greedo -- we're told he's doing well behind bars and is staying positive and healthy. He's currently serving a 20-year sentence on drug and gun charges.

Drake is bringing some heavy hitters to the stage Monday in Toronto for his annual OVO Fest ... we just got wind of the lineup, and it's INSANE!!!

Our sources tell us this is the star-studded group set to perform ... Meek Mill, Chris Brown, Tyga, YG, Megan Thee Stallion, Cardi B and Offset, DaBaby, Lil Baby, Rick Ross and Gucci Mane!!!

OVO Fest 2019 kicked off Sunday night at the Budweiser Stage in the Six ... with special performances by B2K, Mario, Lloyd, Pretty Ricky, Ying Yang Twins and Bobby V.

A solid opening-day lineup, no doubt ... but tonight is shaping up to be EPIC!!!

Safe to say OVO Fest is the place to be for a little Monday fun day ... and for everyone who is not up in Canada tonight, good luck dealing with a serious case of FOMO.

Rihanna is looking like the sexiest loofah in all the land as she celebrates the Crop Over Carnival in her native Barbados -- and if she's a little tamer this year, it's still a must-see event!

RiRi hit up the carnival Monday wearing this pink feather ensemble. No question about it ... the Caribbean queen rocked it. But, ya gotta admit ... her past outfits have been way more revealing.

Rihanna didn't attend last year's festivities -- a 200-year tradition that marks the end of the sugar cane season -- but fans were salivating at the thought of what she might wear when she announced last month she'd be returning this year.

If ya need a little refresher ... here's why anticipation was so high. Fact is, her outfits never disappoint.

Some might say Rihanna opted for this cute, less overtly sexy look because she's in a relationship. That doesn't track, though, because back in 2017, she was already dating billionaire Hassan Jameel when she wore the hell outta this banger:

That outfit was so fire ... even her most famous ex, Chris Brown, dropped an eye emoji on her Instagram post.

Rich the Kid made sure the viral one-legged Lollapalooza guy didn't have to hop any fences to party his face off at the festival ... by hooking him up with a four-day artist pass!!!

The one-legged dude who went viral after getting busted by cops trying to sneak into Lollapalooza Friday during a massive stampede is Mekailo Woodfork. He tells us Rich gave him the star treatment over the weekend in Chicago after learning of his plight.

Mekailo, an 18-year-old from the Chicago suburbs, tells us he went to the festival with every intention of sneaking in with his buddies. The cops infamously cut his first attempt short, but he says police let him go and he made another attempt to jump a fence -- which he somehow did -- only to have security waiting on the other side.

Enter Rich the Kid ... we're told the rapper saw the viral footage of Mekailo getting busted by a cop, so his manager reached out to the teen over Instagram and hooked him up with backstage access!

LL Cool J has a lot of sympathy for A$AP Rocky, but says if he's convicted in Swedish court of assault, he can't go on the lam.

LL was at LAX Friday and made one point clear ... if he were in A$AP's shoes and got a guilty verdict, he would not just go back to Sweden and face the music ... rather, he'd "negotiate." We're reading between the lines, but it seems he's saying he'd do a little horse trading ... I'll come back, but you can't throw the book at me.

As for never going back, LL thinks that's a bad idea. Even if Rocky couldn't be extradited from the U.S., his travel would be severely restricted because other countries might in fact hook him up and send him back to Sweden.

As we reported, it's looking likely that A$AP will be found not guilty, because prosecutors failed to prove A$AP struck the alleged victim with a bottle.