Celebrity Rehab

Zac Efron may have found refuge from his modern-day troubles ... by looking to the ancient past -- namely ... the Incan ruins of Machu Picchu in Peru.

Zac just posted this picture on his Whosay account -- with a big grin on his face as he posed on a mountaintop more than 7,970 feet above sea level.

TMZ broke the story ... Efron was in rehab twice this year for a serious cocaine problem.

Zac said he was in Peru with his dad ... and thanked his fans for all their support.

Lindsay Lohan will get to keep her huge paycheck from Oprah Winfrey ... but only after an intense showdown between O and LiLo ... TMZ has learned.

We've confirmed ... Lindsay was a disaster at the beginning of the project -- at times just being a no-show -- which doesn't work in Oprah's world. We're told Oprah went to Dina's house on Long Island for a showdown with Lindsay. She told Lindsay either clean up her act or the project is over and Lindsay would not get her $2 million paycheck.

Our sources say Lindsay had a bunch of excuses ... she was spending time trying to find an apartment in NYC, she had other projects she was trying to finish, there were "miscommunications" between her people and the folks at OWN, yada yada.

Oprah made the ultimatum clear and Lindsay got the message.

We're told Lindsay is now cooperating and things have been running okay for nearly a month, but Oprah is still watching Lindsay like a hawk.

Lindsay Lohan has every right to blame her addiction issues on her mother AND her father -- so says Michael Lohan who's now fully admitting their nasty breakup put Lindsay on a path to failure.

We spoke to Michael just hours after Dina Lohan pled not guilty to DWI -- telling us, "I think because of [my and Dina's] divorce and what happened, Lindsay was put in a horrible position."

Khloe Kardashian went clubbing last night ... and a security guard went clubbing too ... clubbing photogs.

Sources inside Tru nightclub in Hollywood tell TMZ ... Khloe was hanging out with The Game and a few of his friends. We're told she did not drink alcohol the entire evening.

Khloe left the club at around 2:30 AM, and as she beat a hasty retreat a security guard went a little nutzo on our camera guy ... pushing him to the ground.

Even though Khloe hit the clubs -- sans Lamar -- sources connected to K.K. tell us she has not given up on her marriage. She's trying to figure out how to convince Lamar to seek help ... something he's been unwilling to do. BTW ... she was wearing her wedding ring.

Graphic photos of Oscar De La Hoya on an apparent cocaine binge during a party in Las Vegas are being shopped to the highest bidder -- they show just how scary his addiction had become and possibly explain the curious timing of going to rehab just before his epic fight as a boxing promoter.

We're told the photos were shot at a party in a Vegas hotel room a few weeks before Oscar announced he was back in rehab -- and they appear to show the ex-champ using a rolled up bill to do lines of a white substance off a plate on a table. According to the seller of the pics the substance is cocaine.

Another pic shows De La Hoya leaning back from the table with a grimace on his face.

We've seen the photos -- which are making the rounds to media outlets -- and they offer a possible explanation for why Oscar suddenly checked into rehab just 4 days before what was, arguably, the biggest fight of his career as a boxing promoter ... the Mayweather-Canelo bout.

Sources tell us Oscar was "off the hinges" at the party in the photos, and made the decision to check into rehab shortly after ... realizing just how reckless he'd been that night.

As far as we know, the photos have not yet been purchased.

We're told De La Hoya is aware of the pics. We reached out to his rep ... so far, no word back.

Emmy winner Peter MacNicol is not buying what Jack Klugman's angry son is selling because Peter thinks the tribute to Cory Monteith could actually save lives.

MacNicol -- who won an Emmy for "Ally McBeal" and also starred in classics like "Ghostbusters II" and "Sophie's Choice" -- tells TMZ tonight's tribute to Cory will create enormous drug awareness and possibly reach thousands of teens on a path of destruction.

Peter doesn't think it matters that Cory died without a single Emmy. He says, "If we are going to get into a merit system based on longevity then we are in trouble."

Tell that to Adam Klugman -- who is furious that his 3-time Emmy winning deceased father is barely getting a mention at tonight's ceremony.

Jack Klugman -- who has won 3 Emmys and starred in TV classics -- "The Odd Couple" and "Quincy M.E." -- has been overlooked and disrespected for special mention during tonight's ceremony. Instead ... Cory Monteith gets the honor. Jack's son thinks it's ridiculous and disrespectful, and he's right.

The Emmys are honoring 5 TV types who died in the last year -- 4 of whom have earned their stripes ... Jonathan Winters, Jean Stapleton, James Gandolfini, Gary David Goldberg -- and then there's Cory.

BTW ... Larry Hagman was also overlooked.

Scott Thorson -- a central character in the HBO movie, "Behind the Candelabra" which has 16 nominations -- is getting anything BUT fabulous treatment, because he's NOT invited to the Emmys.

An Emmy official tells TMZ -- it's simple ... Thorson -- who is played by Emmy nominee Matt Damon ... doesn't have a ticket and the event is sold out.

It's not as if Liberace's former lover -- who's currently in an outpatient facility for drug abuse -- didn't want to go. TMZ obtained a letter dated August 8th and written by Scott's drug counselor, asking a drug court judge to give him a weekend pass to attend the Emmys.

Rather than feeling snubbed, Scott now says it's a good idea that he stay away from Hollywood -- too tempting, and all that.

You may recall ... Scott recently tested positive for meth. He could have gone to jail on a probation violation but the judge showed him mercy and ordered him to continue outpatient drug counseling.

Zac Efron chose an interesting place to escape this month ... jetting off to the mountainous cocaine capital of the world ... but he wasn't there for the skiing.

The above photos were snapped on September 11th in Peru, showing Efron smiling with fans. Sources tell TMZ, Zac flew to the South American country for some mountain climbing, as well as to see the ancient Inca ruins of Machu Picchu.

He was also mobbed by screaming girls a week later at an airport in Cuzco, not far from Machu Picchu.

We're not saying he did or did not partake of the local crop while he was there, but it's still ironic.

TMZ broke the story ... Efron entered rehab twice this year for a serious cocaine problem, most recently in April.

Fun fact: according to the White House drug czar (yeah, we got one of those) Peru overtook Colombia as the world's biggest cocaine exporter in 2011. Now that's what we call winning.

Charlie Sheen says the media outlet that's reporting he had Zac Efron over for drug-fueled parties is totally making it up.

Sheen tells TMZ ... he hasn't even seen Zac for nearly a year ... specifically when Efron showed up to the set of "Anger Management" 11 months ago. Charlie says he showed up not to see him ... Zac was there because they share the same publicist who happened to be on the set.

The report claims Zac visited the set at least a dozen times. Charlie says it's all made up ... Zac was there that one time only.

As for the claim Zac spent a lot of time partying at Charlie's house and then strongly insinuating they were on cocaine binges ... Charlie says, "ridiculous." Sheen says Zac was at his home a grand total of one time -- nearly 2 years ago for a Super Bowl party. The next time Charlie saw Zac was when he visited the set 11 months ago.

Charlie is also angry the report claims he's on an uncontrollable cocaine binge. He says, "Consider the fact that I have completed 54 episodes of 'Anger Management' in a little more than a year ... something that would ordinarily take more than 3 years to accomplish."

Zac Efron has done rehab for cocaine addiction not once this year, but twice, after a major relapse ... TMZ has learned.

Sources familiar with the situation tell TMZ ... Zac has been doing cocaine for more than 2 years -- he was also into Molly. He tried to clean himself up in March by getting professional help. We're told he left California and stayed in a private residence where he received intensive outpatient care for several weeks.

In April he returned to L.A. and began shooting Seth Rogen's film "Neighbors." During the shoot Zac relapsed in a big way. TMZ broke the story ... Zac was not showing up on the set and it was common knowledge he was using again.

Our sources say after the film wrapped up he got a second dose of outpatient care.

As for how Zac plunged into the depths of coke, we're told there are 4 reasons:

-- Zac has significant issues with his parents, who are still trying to control his life and decision-making.

-- Zac is upset about his movie career, which was once white hot but after "High School Musical" he hasn't had real success.

-- Zac has "girl issues" ... although we're told it has nothing to do with his break-up with Vanessa Hudgens. That, our sources say, is ancient history for both.

-- Zac had been hanging around with "a bad group of friends" who introduced him to the world of cocaine. We're told Zac has 86'd most of them from his life in the last few months.

Zac Efron did NOT go to rehab for alcohol abuse -- it was far more serious, because multiple sources tell TMZ he had a serious cocaine addiction.

Zac completed his stint in rehab earlier this year. We're told the problem spiraled out of control during the filming of Seth Rogen's movie "Neighbors," which was shot during a narrow time frame beginning in April.

Sources tell us Zac -- who also starred in the movie -- was a no-show on a number of days. As one source connected with the film tells us, "It was common knowledge he was struggling with cocaine."

Three other sources confirm ... Zac's problem was rooted in cocaine, but say he also dabbled in Molly -- a pure form of Ecstasy, and a popular drug in clubs and raves.

We're told ... early this year, Zac and some friends went on a coke rager in a room at the SkyLofts at the MGM Grand in Vegas ... and caused around $50k in damage. No word on who took care of the bill.

We contacted Zac's rep ... she said, "Don't think we'll be making a comment."

Oscar De La Hoya tells TMZ he accepts Floyd Mayweather's apology -- after Mayweather's team posted an Instagram pic mocking Oscar's substance abuse problems.

Oscar -- who recently checked himself into rehab after falling off the wagon -- was out with a group in L.A. yesterday for a coffee run at a Starbucks and appeared to be in good spirits.

On his way out, we asked Oscar about Floyd's Instagram apology -- and the Golden Boy told us, "It was very nice of him. I greatly appreciated it ... so, thank you."

As we previously reported, Mayweather claims he never authorized anyone to publish the original Instagram image -- and insisted he would "never personally disrespect [Oscar] or anyone else who struggles with addiction."

Floyd Mayweather has issued a full apology for a photo on his Instagram page that mocked Oscar De La Hoya's struggle with substance abuse ... though Floyd insists he never approved the photo to go up.

Mayweather came under fire yesterday ... because after he beat up Canelo Alvarez (who's signed to Oscar's boxing promotion company), a pic was posted on his Instagram page showing a crying De La Hoya along with the caption, "Meanwhile Back In Rehab."

Another caption on the picture read, "Oscar: I gave Canelo the wrong blueprint I was high."

Now, Floyd's speaking out ... with another Instagram post ... which reads, "It's unfortunate that a stupid picture was posted to my Instagram account earlier today that was not posted by me or authorized by me to post."

He adds, "I completely support Oscar De La Hoya and his family during this difficult time in his life. I stand by him unconditionally and would never personally disrespect him or anyone else who struggles with addiction."

"I also apologize to all of my followers for this ridiculous post. I have no ill-will towards anyone."

Floyd Mayweather doesn't think Oscar De La Hoya's stint in rehab is off-limits when it comes to talking smack -- and today, the boxer took a BIG shot at the Golden Boy's substance abuse issues on Instagram.

Money posted a meme featuring a picture of Oscar looking sad ... with the caption, "Meanwhile In Rehab."

Another caption reads, "Oscar: I gave Canelo the wrong blueprint I was high."

The pic is an obvious reference to Floyd's big victory over Canelo Alvarez this weekend ... which took place one day after Oscar (Canelo's fight promoter) checked himself back into rehab for substance abuse.