3:30 PM PST -- A rep for Prince tells TMZ, the singer has been fighting the flu for several weeks. He canceled 2 shows on April 7th but wanted to make Thursday night's performance in Atlanta, even though he was still not feeling well.

After the show, he got on a plane and felt considerably worse, so his plane made an emergency landing in Moline, Illinois, where he was taken to the hospital and treated. He was released 3 hours later, got back on the plane and is now back home. 

Prince was rushed to a hospital early Friday morning after his jet made an emergency landing in Illinois ... TMZ has learned. 

According to our sources, Prince's private plane made an unscheduled landing at Quad City International Airport in Moline just after 1 AM. The singer was immediately transported by ambulance to a nearby hospital.

A source close to the 57-year-old singer tells us he's been released and is doing okay. The nature of the medical emergency is unclear.

The Rock and Roll Hall of Famer had performed Thursday night in Atlanta ... and he was in the air for only a short time before things went south.

ZZ Top bassist Dusty Hill ain't that much of a rough boy after all -- he fell right before the band's show Thursday night in Texas and dislocated his shoulder ... forcing them to cancel the concert.

The bearded ones were set to play in Lubbock, but a manager at the venue tells us Dusty fell as he was getting off his tour bus. It's unclear what caused the fall.

The manager says an ambulance on site took the 66-year-old rocker to the hospital for treatment. ZZ Top momentarily considered going on with the bassist from their opening act, Tim Montana and The Shrednecks -- but decided fans would be disappointed if they went on with half-beard power.

The show's been rescheduled for May 29.

The actress who plays the mom in "My Big Fat Greek Wedding" was taken to the hospital after a nasty car wreck ... and some witnesses say it was her fault.

We're told Lainie Kazan was driving in the Valley Saturday and drifted into an oncoming lane. We're told her Lincoln SUV struck another vehicle head-on. And, of all places, the accident happened right in front of The Great Greek restaurant. For real. 

Our on-scene sources tell us Lainie and the other driver were both conscious afterward -- but you can see in the pics Lainie's neck was immobilized in a neck brace.

Lainie's current condition is unclear -- her rep wouldn't comment. No citations have been issued, but cops tell us the accident is still under investigation. 

Vince Neil has an uphill battle to clear his name after his Las Vegas battery citation, since cops say security cameras caught him red-handed ... with a fistful of the victim's hair. 

Neil claimed he only "pushed past" a female autograph seeker at the Aria last week ... but according to police records, obtained by TMZ, officers reviewed surveillance footage which showed the Motley Crue frontman pulling the woman down to the ground by her hair.

Neil has denied it got that physical. She says she was left stunned, and suffered a sore neck ... as well as pain in her lower back and hip.

Cameras also captured the woman taking pics with Carrot Top before she saw Nic Cage. She claims she said, "Nicolas, I love you" and followed the actor before being pulled down.

As for the scene outside -- cops say Neil was actually trying to fight another individual, while Nic tried to play peacemaker.

Everclear's lead singer got into a car wreck ... and he's blaming his Ford's crappy brakes. 

Art Alexakis tells TMZ he was driving the speed limit (35 mph) in Pasadena last Friday night just before sunset when traffic in front of him started to slow down. Art says he tried punching the brakes on his 2013 Ford Flex but they just didn't bite ... causing him to rear end the car he was trailing.

We're told cops and EMS responded to the scene to check everyone out and gave the all clear. Art says all he suffered was a scratch on his leg. 

As for the Ford, Art says it was a goner ... but the good news? Insurance is picking up the tab on a new ride and everything is wonderful now.   

Axl Rose broke his foot and underwent surgery, and he just announced it ... HOURS before Guns N' Roses officially kicks off their tour!

Axl posted an x-ray of his left foot and said, "This is what can happen when you do something you haven't done in nearly 23 years."

The real GNR is playing its first arena show in decades tonight and Saturday night in Las Vegas. We're told the injury happened when Axl slipped onstage while singing "Mr. Brownstone" during last Friday's Troubadour show. We're told Axl knew something was busted, but toughed it out. Rock 'N' roll. 

He had surgery earlier this week, and got a bunch of hardware to repair the fracture. We're told he'll be in a cast for all the Vegas and Coachella shows, but don't expect him to be sitting the whole time. They're making some kinda support for him and the setlist won't be shortened.

The band clearly knows this would freak out fans. They got Axl's doc to explain the injury and the surgery.

Legendary Utah Jazz coach Jerry Sloan is battling both Parkinson's disease and Lewy body dementia ... according to a report in the Salt Lake Tribune.

Sloan -- who coached great Utah teams featuring Karl Malone & John Stockton -- told the paper he decided to reveal his diagnoses because his symptoms have become visibly noticeable.

According to the Mayo Clinic, Lewy body dementia is a condition that causes a progressive decline in mental abilities and can sometimes cause hallucinations.  

Despite the setbacks Sloan says he's still walking 4 miles a day and is adamant he's not looking for sympathy from anyone. 

"I don't want anyone feeling sorry for me."

'O.C. Housewives' Vicki Gunvalson and Tamra Barney were way worse off than we initially thought after they rolled an ATV while taping on Saturday. 

TMZ obtained these photos and video from the crash scene in Glamis, CA ... where Vicki had to be airlifted to a hospital for treatment. Witnesses on scene tell us she was puking after the accident, and couldn't feel her fingers. Both women complained of neck and back pain, and you can tell from these images ... everyone on scene was concerned about the severity of the injuries. 

We're also told Tamra, who was driving the Polaris RZR, had been warned several times by the people training her to slow down. 

TMZ broke the story ... both women had to be hospitalized after the accident, which happened while they were shooting for the show.

Both have been released, and we're told they're recovering well.

Tamra Barney and Vicki Gunvalson were hospitalized -- one of them was even airlifted -- after a joyride in the California desert nearly turned tragic.

Law enforcement sources tell TMZ the accident happened in Glamis, CA around 12:50 PM Saturday ... when the Polaris RZR the women were riding in rolled over multiple times. A camera crew for "Real Housewives of the O.C." was taping at the time, and according to sources connected with production ... Tamra was behind the wheel.

We're told Vicki was airlifted to a nearby hospital for treatment. She was released early this morning with no major injuries. Tamra was also hospitalized, but released on Saturday. 

Both women were transported mostly out of an abundance of caution. We're told neither was in grave danger. 

Lamar Odom hitting the bottle again is taking such a toll on Khloe Kardashian, she pulled the plug on taping "Kocktails with Khloe" this week ... TMZ has learned.

We're told Khloe told production she was too sick to shoot Thursday, but it's not because of the flu. Sources close to production tell us she's stressed out worrying about Lamar Odom's drinking. We're told she's been an emotional wreck.

TMZ broke the story ... LO is refusing to get treatment for addiction as Khloe insists he try something, even an outpatient program. We're told they've been fighting about it all week.

Our sources say enough was enough and Khloe just needed a break.

Robert Duvall looked as healthy as the horse he rode in on ... at a "Lonesome Dove" reunion Thursday ... despite reports he'd suffered a stroke. 

Several news outlets reported Duvall, 85, had gone MIA the last 7 months following a health scare. But his rep, Jim Dobson, tells TMZ the stroke thing is 100% false, and the pics from the reunion in Fort Worth prove it.

The real deal -- we're told Duvall's been in Florida with his wife, Luciana, for the last 4 months ... and he's working on casting a new film in which he'll also star.

Bobby D. hung with ex 'Lonesome' co-stars Danny Glover and Ricky Schroder at the reunion, and also gave a speech to honor the classic TV mini-series.

"Dancing With The Stars" pro Keo Motsepe is probably still recovering from getting his balls nearly crushed during rehearsals Thursday ... and it was all caught on tape!

Motsepe was in the middle of turning his partner Jodie Sweetin when her microphone pack got loose, started swinging and yanked the mic cord right where it hurts most.

Needless to say, Motsepe needed a timeout, but Jodie found a way to make things worse!

Watch ... then say a prayer for Motsepe's sack.

R&B singer Kehlani says she was so devastated over rumors she cheated on her boyfriend Kyrie Irving, she tried to kill herself Monday night ... but fortunately, she survived. 

Kehlani posted the ordeal on Instagram -- showing a pic of herself with an IV in her arm in a hospital bed with the caption, "I wanted to leave this earth. Being completely selfish for once. Never thought I'd get to such a low point."

FYI -- The Internet was brutal to Kehlani Monday over a picture that suggested she cheated on Irving with her singer ex-boyfriend "PartyNextDoor."

But Kehlani says SHE NEVER CHEATED -- and says she was already broken up with Irving when she got back together with "PND."

"I am severely utterly in love with my first love. Went thru a bad breakup and ended up easing into a relationship with a man who was one of my bestfriend [Irving]. Tho we realized we both weren't exactly at a time where we were prepared to do so."

"No I'm not a CHEATER, a THOT, im a BELIEVER IN FOLLOWING YOUR HEART and not LYING TO YOURSELF."

Translation -- I was with PND. We broke up. I got with Kyrie. We realized it wasn't working out. Got back with PND.

Kehlani says PND helped save her life last night -- says "God saved me for a reason."

She has since deleted everything from her Instagram page.