Nurse!

Justin Bieber is back like he never left ... performing for the first time since his serious health scare.

Justin hit the stage in Lucca, Italy Sunday, and he was his old self ... performing his hits shirtless, dancing around the stage -- he brought the house down.

As we reported, Justin was diagnosed with Ramsay Hunt Syndrome, a rare virus that caused paralysis in his face, among other issues.

J.B. took a month off, pausing his world tour. He promised fans he'd be back to business at the end of July, and he delivered ... though just barely!

He's scheduled to hit the stage in South America, South Africa, the Middle East, Asia, Australia, New Zealand and Europe, again ... before making his way to the U.S.

Popular Louisiana rapper JayDaYoungan was fatally ambushed by 5 gunmen ... according to his father, who was there when his son was gunned down.

The slain rapper's dad, Kenyatta Scott, tells TMZ ... he and JayDaYoungan were sitting in the front yard of their Louisiana home Wednesday evening when a black truck pulled up and 3 people hopped out with guns.

Scott says he and his son tried running inside the house, but 2 more people with guns approached from the side of the property ... and then shots rang out.

JDY's father says he was armed too and shot back to defend himself and his son. Scott was shot twice in the arm, while JayDaYoungan was struck at least 8 times. Scott remains in the hospital.

TMZ broke the story ... JDY lost a lot of blood in the shooting and underwent surgery, but died in the hospital.

The rapper's dad believes his son's murder was the result of jealousy ... that he made it out of Bogalusa ... he thinks whoever was behind the shooting was envious of JDY's success.

Scott says his son didn't have beef with anyone, and he doesn't think it was gang-related. He does not think JDY knew the gunmen.

Bogalusa Police Chief Kendall Bullen tells TMZ ... cops are looking at all possibilities for a motive, including gangs and/or retaliation.

For some reason, cops think there was only one shooter ... police have not ID'd the suspect or made any arrests.

One of the Ying Yang Twins collapsed at a concert over the weekend, and had to be carried off the stage.

The Twins were performing at a show in Springfield, MO at the Ozark Empire Fair, when 30 minutes into their set, D-Roc just crashed to the floor of the stage. Security rushed up to him and got him off the stage ... presumably for help.

The Ying Yang Twins were special guests at the concert, headlined by Vanilla Ice.

It's unclear what happened to him ... temps were in the 80s so it doesn't seem like heat exhaustion. We don't know if he was taken to the hospital nor do we know his condition.

President Biden has contracted COVID-19 again -- this after several days of testing negative for the virus and seemingly entering the recovery lane, with any illness in the rearview.

JB announced he'd tested positive once more on Saturday, taking to Twitter to write ... "Folks, today I tested positive for COVID again. This happens with a small minority of folks. I’ve got no symptoms but I am going to isolate for the safety of everyone around me. I’m still at work, and will be back on the road soon."

His White House physician, Dr. Kevin O'Connor, supplemented the news with a bit more information and context, publishing a letter that further described Biden's renewed case.

Dr. O'Connor described this as a "rebound" effect, something he says happens with a small percentage of people who catch COVID and are treated with something called PAXLOVID -- which seems to be a medication POTUS was given to help combat the virus and symptoms.

His letter goes on to say Biden tested negative on Tuesday, Wednesday, Thursday and Friday -- but despite this, an antigen test administered on Saturday morning proved to be positive. The doc notes, "The President has experienced no reemergence of symptoms, and continues to feel quite well."

It continues, "This being the case, there is no reason to reinitiate treatment at this time, but we will obviously continue close observation." Even though he won't go on any more meds for COVID, Biden will re-enter isolation procedures out of precaution, just like before.

Earlier this week, he made his official return to work and did a public appearance in the Rose Garden. He'd also told the press he was "feeling great" and was ready to get back to it.

IG model Gena Tew says for years she thought she was testing for HIV when she'd get STD checks, but that wasn't the case, and a recent breakdown of her body led to her finding out she has AIDS.

Gena has gone viral on social media, telling her story and urging the importance of young people getting tested. She tells us the symptoms have been horrible -- she's lost mobility, control of her bowels and has gone blind in her left eye.

Gena says the diagnosis has changed her life, as well as the life of her mom, who helps to care for her.

She says she's still not sure when she contracted HIV, but has called her sexual partners to let them know of her status. Gena says everyone she's called has been very supportive, checking in on her and making sure she's doing OK. She says so far, no one else has tested positive.

One thing Gena wants to clear up -- blogs have speculated she's been intimate with Chris Brown and Nick Cannon in the past -- something Gena says is just not true.

New York Gov. Kathy Hochul is not monkeying around when it comes to monkeypox ... she just declared a disaster emergency for the entire state to curb the growing spread of the disease.

On Friday night, Hochul tweeted the announcement, highlighting that 1 in 4 monkeypox cases in the U.S. originate in New York so, therefore, she wants to generate a faster response to combat the virus and get more people vaccinated.

Her announcement comes just one day after the New York State Commissioner of Health called monkeypox an “imminent threat to public health.”

Although the viral disease is almost never fatal, it can spread across the body, forming rashes and lesions on extremities and genitals.

New York and California are at the top of the list of states with the most recorded cases of monkeypox ... New York has 1,345 cases and California is second with 799, according to the Centers for Disease Control and Prevention.

Hochul's executive order allows for EMS personnel, pharmacists, midwives, physicians and certified nurse practitioners to administer vaccinations.

Nick Bostic, the heroic pizza delivery guy who saved 5 kids from a burning house, is getting some serious recognition for his life-saving actions ... and it might make his NASCAR dreams come true.

Nick tells us honchos at NASCAR reached out to him and invited him to be a special guest at Sunday's race at the Indianapolis Motor Speedway.

It sounds like Nick will be in for a bunch of surprises when he's a VIP at the Verizon 200 at the Brickyard, he's not sure what's in store, but he's hoping to get behind the wheel of a race car.

Nick says it's always been his dream to be a NASCAR driver, he sounds confident he might blow his hosts away with his racing talent, if he's given the chance to show what he can do.

Remember ... Nick was driving through Lafayette, Indiana back on July 11 when he spotted a house engulfed in flames with no firetrucks or other emergency vehicles in sight.

Nick acted quickly, rushing into the home and leading 4 children safety before realizing there was a 6-year-old girl trapped still inside. He found her and jumped from a second-story window with her in his arms, using his body to cushion the fall and saving her life.

It's good to see Nick getting the recognition he deserves ... and it sounds like his recovery is going well.

Monkeys are terrorizing residents in a Japanese city ... targeting young children and babies, and even hanging out at preschools to grab them.

The wild scene is playing out in the city of Yamaguchi in southwestern Japan, where city officials say a troop of monkeys has been carrying out the attacks since July 8 ... biting and clawing at human flesh, and sneaking into nurseries to try and snatch babies.

It's a huge problem ... the attacks involve at least 58 people, and the city is responding by hiring a special unit to hunt the monkeys with tranquilizers, with a 15-pound monkey already being caught and killed.

The story gets even weirder ... officials say the monkeys aren't interested in food, so traps aren't working, and they're mostly going after children and the elderly, often sneaking up from behind and grabbing people's legs.

The attacks include an assault on a woman while she was hanging laundry on her veranda, and there are images of monkeys peering through windows and loitering outside schools.

Japanese macaques are the monkeys behind the attacks, which are sending folks to the hospital in droves.

Crazy scene at the Tour de France Femmes on Thursday ... when a crash resulted in a huge pile-up during Stage 5 of the event, requiring one rider to be taken away in an ambulance.

It all went down with about 28 miles left in the race -- when two riders made contact with each other ... causing them to wipe out.

The crash sparked a domino effect, with 30 riders getting tied up in the crowd.

Somehow, most riders were eventually able to get back up and finish the stage, but Movistar's Emma Norsgaard required further medical attention and was taken away from the scene in an ambulance.

Several other riders required assistance with minor injuries after completing the stage.

Lorena Wiebes of Team DSM ended up winning the stage ... beating out Elisa Balsamo and current leader Marianne Vos in the tight race.

Jon Stewart is putting the Republican party on blast after voting "no" on a bill to expand healthcare coverage for veterans ... and he's calling one Senator out specifically, saying the guy's nothing short of spineless.

Jon joined House Speaker Pelosi and a group of veterans for a powerful press conference on the PACT Act Thursday ... and he lays it down hard on the GOP Senators who blocked the bill with a 55 to 42 vote.

The House already passed it, and if it got the necessary 60 votes in the Senate the bill would help those exposed to toxic burn pits and Vietnam-era veterans exposed to the deadly herbicide Agent Orange.

He begins to list the ways the PACT Act could help, before a veteran seated next to him mentions it'll prevent people like him from going down dark paths, including suicide. The man was holding a sign reading, "Veterans blood is on Republicans hands."

Jon then points his frustration toward PA Senator Toomey, saying he "isn’t going to hear that because he won’t sit down with this man, because he’s a f**king coward."

Toomey showed his lack of support for the bill directly on the Senate floor, claiming it would create $400 billion in unrelated spending, which he called a “budgetary gimmick.”

Jon says the GOP Senators aren't supporting the troops, but they will support the war machine ... referring to the massive Pentagon budgets they happily pass.

He also got a laugh from the crowd, talking about them working on "Senate time" -- calling them tortoises that live to be 200.

Horrifying moment in the Marlins vs. Reds game Thursday afternoon ... Miami pitcher Daniel Castano was drilled in the head by a 104 MPH line drive, but somehow, he appears to be OK.

The terrifying scene just happened in the bottom of the first inning at Great American Ball Park in Cincinnati ... when Castano threw a slider to Donovan Solano.

The Reds third baseman smacked the ball violently ... and it made a beeline straight for Castano's face.

Thankfully, Castano was able to turn away enough to avoid getting hit near the eye area -- and the ball popped off his head and his teammate was able to record the out.

The 27-year-old lefty stayed down on the mound for several moments as trainers raced to his aid, but he was able to walk off under his own power.

In between innings, Marlins manager Don Mattingly appeared to tell an umpire that Castano had avoided serious injury, explaining the ball appeared to mostly hit the brim of the pitcher's cap.

Miami, though, has yet to officially release an update on his status.

A horrifying moment was captured by a fan during a concert in Hong Kong, as a massive video screen fell from above, crushing dancers below.

Boy band Mirror was playing at The Hong Kong Coliseum Thursday night when the nightmare unfolded. You can see the group performing when suddenly, a video monitor hanging from the ceiling falls directly on one of the dancers.

The heavy screen makes a direct hit, knocking the dancer flat on his back, pinning him underneath. It then falls on its side, landing on another dancer.

Local reports say as many as 3 people in the show were injured as a result of the collapse.

Dua Lipa's concert in Toronto featured some unplanned effects, thanks to some fans who somehow snuck fireworks inside the venue, lighting them, and injuring a few fans.

The singer took the stage at Scotiabank Arena Wednesday night when a series of fireworks were set off from the floor seats. In video from the show, you see multiple explosions of different colors as Dua and dancers perform.

A rep for Toronto Police Service tells TMZ they got a call to the arena just before midnight for fireworks at the end of the show.

We're told at least three people suffered minor injuries, but fortunately, no one needed to be hospitalized ... the specifics on the injuries was not clear. There was also no damage to the arena, a lucky fact given the possibility of fires.

At this time, cops are working with the security staff at Scotiabank Arena to review surveillance footage to determine how the fireworks were brought inside and who is responsible for setting them off.

Tsudoi Miyazaki -- a Japanese triathlete and aspiring Olympian -- was tragically killed on Wednesday after she was struck by a car while training on her bike in France.

She was only 25.

The terrible incident happened near Orleans (almost two hours south of Paris) where Miyazaki was staying for a triathlon training camp at an overseas base, according to the Triathlon website.

Miyazaki was out riding on her bike for practice when she was hit by a car ... and sadly, she did not survive the accident.

"World Triathlon and the Japan Triathlon Union want to offer our deepest condolences to Ms. Miyazaki family, friends, coaches and teammates," the org. said in a statement.

"The thoughts of all the Triathlon Family are with you all in these terrible times."

This deadly accident comes just days after Miyazaki competed in the Pontevedra World Cup in Spain -- in fact, her last IG post was about the race and how she "hadn't reached my level yet!"

"It was a good experience and I hope it doesn't end, and I'm going to use what I feel next," Miyazaki said in the caption.

"Thank you from the bottom of my heart for giving me the challenge. Thank you for your support."

During her career -- which started when she was in college -- Miyazaki won the Japan U23 Triathlon Championships in 2019 and was aiming to make it to the 2024 Olympics in Paris and 2028 Olympics in Los Angeles.

The crash is under investigation by the French authorities.

Popular Louisiana rapper JayDaYoungan is currently hospitalized, battling injuries sustained when he was shot outside a home in his home state ... TMZ has learned.

A rep for the Bogalusa PD tells us they received a call just before 6 Wednesday night for a shooting at a home on Superior Ave. Cops say one victim had been transported to a local hospital by someone on scene, and another victim -- who was critically wounded -- was treated by paramedics and rushed to the hospital for treatment.

A law enforcement source tells us JayDaYoungan is in critical condition, and a source close to the rapper tells us he's lost a lot of blood and is currently in surgery. Online reports say the second victim is a relative of the rapper, potentially his father.

We've obtained video taken from outside the home where the shooting happened ... you can see the rapper's blue sports car parked outside.

Cops tell us about an hour after the shooting JDY was involved in, another shooting occurred in which a vehicle was struck ... officers believe it's possible the two shootings are related. We're told no one was injured in that shooting.

The rapper first found success when he signed to Atlantic Records in 2017 ... and has gained a steady following thanks to his mixtapes.

The 24-year-old has collabed with artists like Latto, Moneybagg Yo, Lil Durk and Boosie Badazz.

Story developing ...

Mike Tyson wasn't moving so well this week while out in New York City -- he needed a cane to get around -- but TMZ Sports has learned the boxing legend is uninjured, and is just dealing with a bit of normal, wear-and-tear problems.

Iron Mike raised some eyebrows on Tuesday -- when fans and photogs caught him moving gingerly as he made his way from a car to his hotel room.

The 56-year-old appeared to be limping heavily, and was using a walking stick for support.

But, sources close to Mike tell us he hasn't suffered any new injuries -- and is just working through a little bit of an old back issue.

"He’s dealing with a sciatica flare-up," our sources tell us. "Nothing serious. Just an occupational hazard for an athlete like Mike."

It's great news -- especially considering just a few days ago, Mike said on his "Hotboxin'" podcast that "my expiration date is coming close, really soon."