Ace Frehley will not be back, back in a New York groove ... instead he's laid up in a hospital bed.

The former KISS guitarist says he was admitted to a Pennsylvania hospital for exhaustion and dehydration ... after a concert Friday night.

Frehley is still hospitalized, and as a result had to cancel his scheduled show Saturday nigh in NYC, his hometown.

A message posted on his official website says Ace will head back to L.A. to recover once he's released from the hospital.

This is awesome ... 2 Villanova basketball stars made a surprise visit to the home of a 4-year-old superfan who's battling cancer -- and now they're getting MAJOR props from the kid's mom!!! 

The brave little boy is Blaise Davis -- who's fighting a rare form of bone cancer called Ewing's Sarcoma. His story made national news after a GoFundMe page was set up to help his family pay for medical costs. 

Blaise and his mom, Annie, joined the guys on the "TMZ Sports" TV show (airs Friday night on FS1) ... and told us how Villanova stars Ryan Arcidiacono and Daniel Ochefu put together a plan to surprise Blaise in his own home! 

For the record, Blaise's parents are both alums -- and Annie says Blaise has naturally become a MASSIVE fan of the Wildcats. 

You gotta watch the clip ... Blaise is awesome -- and judging by his energy, he's doing great! 

Lisa Vanderpump's calling BS on Mohamed Hadid's kids suffering from Lyme disease, and her accusation is having major repercussions for the 'Real Housewives' shoots.

Sources tell TMZ Lisa and Mohamed's 20 year friendship came to an abrupt end when Vanderpump, for the umpteenth time, asked about his kids, Bella and Anwar, and their Lyme disease. We're told Hadid was embarrassed because Lisa asked while taping at dinner with friends.

Sources close to the situation tell us Hadid will be cordial during shoots, but ANY attempt to renew the friendship -- even for the show -- is out of the question, as far as he's concerned. 

We're told Lisa's husband, Ken, even tried to patch things up, but Hadid's not budging ... and hasn't even been to any of Lisa's 3 restaurants since the drama.

Lucky for him it's a big city.

Lamar Odom says he's NOT done playing basketball -- and vows to play again because "I still got it."

36-year-old Odom spoke with ET after the Lakers game Wednesday night ... and said the next step in his recovery from his brothel overdose in getting back on the court.

He's dead serious. 

If he somehow pulls it off, it would be one of the most miraculous recoveries EVER -- considering Odom suffered multiple strokes and organ damage after the October incident. 

Odom was also asked if he's "okay" with Khloe Kardashian moving forward with the divorce -- and he made it clear, he's got some serious issues with it. 

"Everything is up for discussion," Odom said ... "I mean we've been through a lot. It won't ever stop."

Jason Momoa's raw strength is so breathtaking ... it even left former Mr. Universe Lou Ferrigno in awe.

The 'Incredible Hulk' star tells us the regime of the former "Game of Thrones" star is especially impressive because of his size -- 6'4" 230 lbs.  

Pulling yourself up with 3 big plates attached to your waist ... amazing.

A video posted by Jason Momoa (@prideofgypsies) on Apr 7, 2016 at 2:08am PDT

Rick Ross has something in common with Rob Kardashian ... they're both wasting away, but there's one major difference -- Rozay isn't cutting back on his chicken wing intake. 

Sources close to Rozay tell us he's determined to lose the lbs he packed on after his arrest for assault and kidnapping -- so, he's back on his RossFit program -- which requires daily workouts.

It's working. He's already down more than 60 lbs, and the weight loss was obvious in his recent Snapchat. 

Our sources say Ross used to scarf down a huge plate of food before bed, but now he's eating earlier in the evening ... and he's eating more fruits, veggies and drinking water instead of soda. The boss is still cheating though. We're told he's still gotta have wings from his Wingstop restaurants.

Some habits he just won't kick.

Somebody get Eddie Lacy some tape ... 'cause the dude is RIPPED UP!

Check out the GB Packers running back proudly displaying his guns in a tank top at LAX this weekend -- showing everyone he's been busting his ass in the gym this offseason after his coach called him out for being overweight. 

We broke the story ... Lacy hooked up with the creator of P90X back in February (after the guy came on "TMZ Sports" and offered to whip Lacy into shape) ... and you can already see the results.  

This dude is strong. 

Check out former NFL player Mike Lockley strength training out in Florida  ... BY PUSHING A BUS DOWN THE STREET!!

Lockley -- who had a brief stint with the Jags -- is now a strength trainer who works with U.S. Olympic sprinter Justin Gatlin ... and his workout program is intense. 

Check out the footage of Lockley not only moving a 28,000 pound bus ... but also pulling a 5,500 pound Chevy Tahoe with a rope WHILE DOING SCISSOR KICKS ON HIS BACK!!! 

#Yoked 

Jake Lloyd, who played Anakin Skywalker in 'Star Wars: The Phantom Menace,' has been moved from a jail cell to a psychiatric facility. 

Jake's been behind bars since June for taking cops on a chase that exceeded speeds of 100 mph.

The actor's mom, Lisa, tells us authorities reached the conclusion he needed help more than punishment, because he suffers from schizophrenia ... thus the move.

Lisa says she spoke with Jake last week and can already see an improvement in Jake's personality.

We're told there's no timetable for his release. His family wants him to take his time to get healthy. 

Rob Kardashian losing weight is now a cottage industry, and not just for Blac Chyna ... because we've learned a couple of fitness companies are pitching in too. 

Kardashian's said his goal is to drop another 40 to 50 pounds in 5 weeks, and reps from Hydroxycut and Quest Nutrition are ready to ship him boatloads of their products to help him reach that goal. 

A rep from Hydroxycut says they want to hook him up with a weight loss pill called Black -- a nice 1-2 punch with Chyna's workout regimen. Meanwhile, Quest says it's interested in helping Rob pack on some muscle with protein powder, chips and bars.

Swag ... the true Hollywood diet plan.  

Larry Drake -- who played Benny on "L.A. Law" -- suffered from a unique disease that caused his blood to thicken ... and ultimately contributed to his death.

According to Drake's death certificate -- he had been diagnosed with polycythemia vera -- a rare form of cancer related to an overproduction of red blood cells in the bone marrow.

The medical examiner also listed cardiac arrest, hypertension, and morbid obesity as causes of death.

TMZ broke the story ... Drake was found dead in his Hollywood apartment by a friend earlier this month.

As for Drake's beneficiaries -- according to docs, he left a friend in charge of his $650,000 estate and requested cremation.

Lamar Odom is playing with fire -- boozing at an Irish bar early Easter Sunday morning ... hours before he went to church with the Kardashians ... TMZ Sports has learned. 

We spoke with multiple staffers and patrons at the bar who tell us Odom arrived to Johnny O'Brien pub in Sherman Oaks, CA with 2 unidentified male friends just before midnight on Saturday -- and stayed until around 1 AM on Sunday.   

Staffers confirmed Odom ordered 3 Remy Martin drinks and paid for them himself. 

Hours later, Odom was spotted at church with Khloe Kardashian and company ... wearing the same sweatshirt, shades and chain. He was holding a Starbucks coffee cup. 

The whole situation is concerning to say the least -- considering Odom has serious substance abuse issues ... which culminated back in October when he overdosed on cocaine and sexual enhancement pills.  

Odom's body has been through war -- he suffered multiple strokes and organ damage due to the overdose ... so drinking might be the last thing you'd expect to see him do.  

We reached out to Odom's camp several times -- but so far, it's radio silence. 

Janice Dickinson has been diagnosed with breast cancer ... but is vowing she will beat it just like so many other challenges she's faced.

The ex 'Top Model' judge revealed doctors found a pea-sized lump in her right breast during a routine medical exam, and immediately ordered a biopsy. She says the results came back positive on March 12.

Janice told the Daily Mail the cancer is in early stages, and believes ... just as she overcame anorexia and alcoholism, she'll triumph over cancer -- "Don't feel sorry for me. I'm gonna stick around for a long, long time."