Celebrity Rehab

John Pinette -- best known for his role as the fat guy who got mugged in the "Seinfeld" finale -- has checked himself into rehab after becoming addicted to prescription medication ... TMZ has learned.

A rep for the venue in Canada where John was set to perform in next month says Pinette had to postpone the gig because he was checking into a rehab facility for his addiction.

The rep says John -- who also had his own Comedy Central special in 2011 -- underwent surgery earlier this year and got hooked to the prescription medication he was taking.

John has since tweeted to his fans about the situation -- saying, "Thanks to everyone for your concern and well wishes.. Want to apologize for having missed shows last weekend, but I hope you understand!"

In case you're not a "Seinfeld" fan (WHAT'S WRONG WITH YOU?!?) ... Here's his famous scene from the super disappointing finale.

At least the reunion on "Curb Your Enthusiasm" kinda-sorta-not-really made up for it.

Khloe Kardashian hasn't given up on her marriage to Lamar Odom ... at least publicly ... because she's still wearing her wedding ring.

Khloe was on her way out of a medical building in L.A. Monday when the photo was taken -- and while it's obvious she was trying to hide her face, she was clearly NOT trying to hide her symbolic commitment to her husband.

Khloe Kardashian has met with Lamar Odom ... and she is desperately trying to save his life -- TMZ has learned.

Sources familiar with the situation tell us, Khloe found Lamar and drove to see him at an undisclosed location.

As TMZ first reported ... Lamar has plunged into the dark world of crack cocaine and Khloe effectively separated from him after throwing him out of the house last Wednesday when he rejected a family intervention.

We're told Khloe has not given up on Lamar although she says she will never get back with him until he's clean. On the other hand, we've learned she has taken no steps to file for divorce because she believes there's still a chance Lamar can be saved.

We do not know how Lamar has received Khloe's latest plea.

Khloe Kardashian and Lamar Odom are separated, but neither has taken any step toward divorce ... sources tell TMZ.

Multiple sources familar with the situation tell us Khloe "effectively" declared separation when she threw Lamar out of the house Wednesday, after he refused her attempt at an intervention. TMZ broke the story ... Lamar has had a crack addiction problem for at least 2 years, and Khloe simply couldn't take it anymore.

We're told Khloe made it clear if Lamar did not get help -- the point of the intervention -- she wanted nothing to do with him anymore.

But we are also told neither Khloe nor Lamar has consulted a divorce lawyer ... at least not yet.

If and when they do file for divorce -- which we're told is likely -- there won't be much to fight over. Sources connected with the Kardashians tell us the couple signed a hard-fought prenup before they married.

We're told Kris Jenner was right in the middle of the prenup battle because she wanted to protect her daughter -- who tied the knot after a 4-week courtship.

Short story ... the fat lady hasn't sung yet, but she's warming up.

Khloe Kardashian kept Lamar Odom's crack addiction secret from her entire family for most of her marriage ... TMZ has learned.

Sources connected to the family tell us ... Khloe did not want to burden her family and jeopardize the Kardashian machine by telling the brood about Lamar's drug issues. We're told Kourtney and Kim Kardashian learned of Lamar's addiction "very recently."

We're told Kris Jenner has known about it for a longer period of time, but was still kept in the dark for many months.

Our sources say even when Khloe reached out for professional help -- for example hiring private investigators to follow Lamar -- she lied about the extent of the addiction. Our sources say Khloe told private investigators Lamar was addicted to "performance enhancing drugs" and that's why she needed their help. She never played the crack card.

When stories started to surface about Lamar sleeping with other women ... and the family started asking questions ... Khloe felt she needed to reveal the real issue. As one source put it, "Khloe was a real trooper. She's been living a nightmare."

The NBA is a "brotherhood" ... and its members will rally to support players like Lamar Odom through good times and bad ... so says Kevin Durant.

Durant was leaving DeMatha High School in Maryland after playing in a Goodman League charity game (he dropped 40 btw) ... when we asked about Odom, who's currently struggling with issues stemming from an addiction to crack cocaine.

Durant made it clear L.O. can count on his fellow players to have his back.

NBA superstar John Wall was also in attendance (though he didn't play in the game) ... and told us he's also rooting for Lamar.

"I just hope he figures it out. That's it."

Lamar Odom has vanished and everyone in his life fears the worst -- that he's off somewhere on a drug binge ... TMZ has learned.

Sources connected to the NBA star tell us people on Lamar's side, and on the Kardashian side have not been able to find Lamar or contact him for nearly 72 hours -- and we're told the main concern is he's hiding out while doing crack cocaine.

As TMZ first reported ... Khloe Kardashian threw him out of the house Wednesday after attempting an intervention which Lamar squarely rejected.

We've already told you Lamar's been battling addiction for at least 2 years -- and even reluctantly agreed to go to rehab in San Diego a year ago ... although he bailed after 3 weeks.

Our sources tell us Lamar has gone off the hinges since basketball season ended and he became a free agent.

We're told his drug addiction is the core reason why his marriage to Khloe has fallen apart.

Short story ... everyone's worried.

3:00 PM PST: We spoke to a rep for Lamar who says Lamar is fine, however he would not say anything about his whereabouts.

Lamar Odom has been deep into crack cocaine for at least 2 years ... TMZ has learned.

TMZ broke the story ... Lamar has gone off the rails with drug use ... which is the principal cause of the crisis in his marriage to Khloe Kardashian. As we reported Lamar went to a rehab facility a year ago this month and stayed for 3 weeks before bailing -- and we're told the problem was crack.

Sources say Lamar's crack use was extreme before he went to rehab, but he cleaned up his act during the basketball season that just ended. Sources say shortly after he hung up his jersey, he started again with a bang.

As we reported ... Khloe threw Lamar out of the house a few days ago after he rejected an attempt at an intervention.

It's unclear how Lamar's problem will affect his basketball career.

The marriage of Khloe Kardashian and Lamar Odom is in crisis, and TMZ has learned ... the core reason is hardcore drug abuse.

Multiple sources familiar with the situation tell TMZ ... Lamar has had a problem for 2 years. It got so bad, last August Khloe pressured Lamar to go to rehab. Lamar went to a facility in San Diego, but he was so resistant Khloe hired private investigators to secretly stand guard at the rehab place to make sure he didn't leave. The P.I.s stood guard 24/7.

Our sources say Lamar constantly threatened to leave and Khloe made several visits to prevail upon him to stay. We're told after 3 weeks, Lamar left for good.

We're told Lamar actually stayed clean once he left rehab and was able to play well for the Clippers this past season. But when the season was over, sources say Lamar slipped deep back into hardcore recreational drugs.

As for reports that Lamar was cheating recently, we're told Khloe is convinced it happened, and she feels she's been hit with a double whammy ... but drugs are the main problem.

As for divorce ... neither Khloe nor Lamar has contacted a lawyer. As one source put it, "Khloe is more concerned about saving Lamar than ending her marriage."

We're told the situation has become dire. Sources tell us ... within the last 2 days, the entire family staged an intervention, trying to convince Lamar to go back to rehab, but he wouldn't have any of it.

In fact, on Wednesday morning, right after the failed intervention, Khloe threw Lamar out of the house and as you see from the pic (above), one of Lamar's friends is loading Lamar's stuff in his car as Lamar watches.

Lindsay Lohan was such a pro on the set of "Eastbound & Down" ... its star Danny McBride wants to take her talents with him ... to a show he's developing for HBO.

Sources close to LL tell TMZ ... while guest starring on "E&D" Danny -- a.k.a. Kenny Powers -- and LiLo really hit it off. Danny was so impressed with her work he had several serious talks with her on set about a new show. He wants her to star in it.

We're told the show is being developed by McBride and his producing partner Jody Hill. It will be in the same comedic vein as "Eastbound" ... but revolve around a high school.

Our sources say Lindsay loves the idea and is hoping it works out.

Lindsay Lohan is fiercely defending her decision to hang with a friend who has an even more checkered past with drugs than her, and actually thinks it's a positive step for her recovery -- problem is ... she's delusional.

Sources close to Lindsay tell TMZ ... she doesn't understand why her shopping trip with Vikram Chatwal would raise concerns she's hanging with a bad crowd, and putting herself in danger of a relapse.

As we previously reported ... Chatwal was busted for drug possession in April, but avoided jail by agreeing to 12 months of in-patient rehab.

We're told Lindsay thinks Vikram is good company because, like her, he's been through several rehab stints ... and is currently in recovery.

Here's the flaw in that argument ... multiple drug counselors -- from reputable clinics -- tell us Lindsay's playing with fire by hanging with old friends connected to her partying ways.

Most counselors told us ... it's "not recommended" for recovering addicts to hang with another addict -- especially if it's been a short stretch since they got out of rehab.

Lindsay's been out for 22 days, and while it's unclear when Vikram was last in treatment ...his drug bust was just 4 months ago. Not to mention, neither volunteered for rehab, but had to be forced by a judge.

Here's a question: if Lindsay Lohan really did cut all her toxic friends out of her life ... why was she spotted hanging out with a rehabbing hotel magnate who was busted for heroin in April?

Lindsay and pal Vikram Chatwal were photographed out in NYC Tuesday, reportedly shopping together ... you know, buddy stuff.

But here's the thing: Lindsay told friends she had permanently excised all the bad influences in her life in order to focus on sobriety and kick her substance abuse issues once and for all ... so it's a little surprising to see her hanging out with this guy.

FYI, Chatwal was busted in April after cops say he tried to get on a plane with cocaine, weed, heroin and various prescription pills. He struck a plea deal that let him avoid jail if he completed 12 months of in-patient rehab.

According to media reports, Chatwal's been to rehab AT LEAST 4 times since 2009.

We're not telling Lindsay who to be friends with ... we're just asking the question.

Lindsay Lohan calmly told Oprah Winfrey she's an addict, and her poison of choice has always been alcohol, but she definitely dabbled in cocaine.

You gotta watch the way Lindsay handles herself ... she's not fidgety, which was pretty much a constant in her life until this round of rehab.

During the interview on Oprah's Next Chapter, she copped to using cocaine more than she had admitted in the past. The question -- is she really telling the truth?

Kendrick Lamar called mainstream rap on the carpet this week ... and it's clearly pissed off Diddy and his cohorts. Meanwhile more professional athletes are coming out of the closet. So we gotta ask ...

More fingerpointing in the death of "That '70s Show" star Lisa Robin Kelly ... 'cause after Kelly's boyfriend blamed her estranged husband for causing the actress to relapse ... the husband tells TMZ the fault lies with the BF.

We spoke with Kelly's estranged husband Robert Gilliam ... who tells us the only reason LRK's boyfriend trashed him to the media after she died Thursday is because "he's trying to cover his own ass."

"In the last two weeks, she called me 22 times to get away from him," Gilliam says.

Gilliam says he offered to help Lisa -- who struggled with alcohol abuse for years -- but under one condition ... she had to check in to a rehab center closer to Northe Carolina, where they lived when they were together.

Gilliam says Lisa agreed -- so he started setting things up ... but she passed away before she could make the move.

Lisa Robin Kelly was not taking any withdrawal drugs at the time she died -- at least that's what the rehab facility told law enforcement ... TMZ has learned.

Our law enforcement sources tell us ... reps from the L.A. County Coroner and L.A. County Sheriff's homicide came to Pax Rehab House in Altadena, CA Thursday afternoon, and officials from Pax said unequivocally ... they did NOT give Lisa any drugs.

TMZ broke the story ... the star of "That '70s Show" died in her sleep Wednesday night, after being admitted to the facility on Monday for alcohol abuse.

We're told law enforcement is calling Lisa's death "a mystery." There were no drugs or alcohol in her room, no vomit in her airway, and no obvious sign of trauma.

As we reported ... Lisa's boyfriend took her to the hospital Sunday, where she registered a .34 blood alcohol level, which is borderline fatal. Lisa was admitted to Pax the next day, and she had been to rehab dozens of times before -- yes, dozens.

The Coroner is doing an autopsy.