Celebrity Rehab

"The Situation" is in rehab for substance abuse ... TMZ has learned.

Sources tell TMZ the "Jersey Shore" star -- aka Mike Sorrentino -- has checked into an inpatient treatment program.

A rep for the Situation just contacted TMZ to say they are not confirming that Mike is in rehab ... just that he "has spent the past several weeks at an undisclosed location for much needed rest and recuperation after his extensive production and appearance schedule."

Like most of the 'JS' crew ... Sorrentino's been on a non-stop party train since the show debuted on MTV 2 years ago -- drinking and making paid appearances at nightclubs all over the world.

Sitch makes anywhere from 15K ... up to a whopping 50k per nightclub appearance.

MTV just announced "Jersey Shore" is returning for a 6th season ... which is scheduled to start shooting this summer.

1:10 PM PT -- The Situation is currently undergoing treatment for prescription pills at the famous Cirque Lodge in Utah.

Tila Tequila has agreed to enter rehab for substance abuse in addition to seeking treatment for psychological issues -- Tila's close friend and manager tells TMZ.

According to her manager, Tila agreed to treatment after several of Tila's friends discussed her problems with her -- following Tila's suicide scare last week.

We're told Tila has been struggling with serious substance abuse problems as well as psychiatric issues recently -- the suicide scare was just the straw that broke the camel's back.

It's unclear when Tila plans to enter a treatment center -- but we're told her friends are hoping she'll get help as soon as this week.

We're told a rehab facility has already agreed to take her -- though sources wouldn't specify which.

Alex O'Loughlin, star of the hit CBS show "Hawaii Five-0," is taking a break from production to get treatment for a problem with prescription pain medication.

The actor's rep released a statement saying, "Alex is taking a short break to receive supervised treatment for prescription pain medication due to a recent shoulder injury."

Former "Celebrity Rehab" star Shifty Shellshock has officially been charged with drug possession and battery after his cocaine arrest last week -- when an argument with his girlfriend allegedly turned violent.

TMZ broke the story -- the former Crazy Town singer was busted at a Ross Dress for Less in L.A. -- after a store employee allegedly witnessed Shifty grab his GF by the arm and rough her up.

The police rushed in -- and after cops searched him, they claim Shifty was carrying rock cocaine. He was arrested on the spot.

12:04 PM PST -- Gerard's manager, Alan Siegel tells TMZ, "Gerard left Betty Ford early this morning and he's healthy."

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Gerard Butler is being treated for substance abuse at the Betty Ford Center ... TMZ has learned.

Butler's problems were triggered by the physical demands of shooting "300" in 2006 (see video below of Gerard preparing for the role). We're told the actor began struggling with pain management, and the problem became exacerbated while filming "Of Men and Mavericks," when Butler was badly hurt on December 18 during a surfing accident.

We're told Butler realized he was relying too much on prescription drugs and decided to head off a full-blown addiction by entering Betty Ford three weeks ago.

Sources tell TMZ ... Butler also developed issues with cocaine, but the root problem appears to be the injuries and pain management.

We're told Butler will be leaving Betty Ford later today.

Former "Celebrity Rehab" star Shifty Shellshock was arrested for possession of rock cocaine last night ... after getting into an argument with his GF at a Ross Dress for Less ... TMZ has learned.

Sources tell TMZ ... the former Crazy Town singer and his GF were arguing inside of the Ross on Sunset Blvd. in L.A. last night ... when things allegedly turned physical.

We're told a Ross employee believes he saw Shifty grab the woman by the arm and rough her up ... so the employee ran outside and flagged down police.

Sources tell us ... cops searched Shellshock and found rock cocaine ... and arrested the guy for possession of a controlled substance.

We're told Shifty is still in police custody.

Tess Taylor -- model, former reality star, and sister to Burglar Buncher Alexis Neiers -- has entered rehab for a heroin addiction ... TMZ has learned.

Sources close to Tess tell us, she entered the Pasadena Recovery Center last Sunday -- after her felony drug possession arrest last month. We're told the arrest was the primary catalyst behind her seeking treatment again.

Tess entered rehab for an opiate addiction one year ago -- but quit after 30 days.

Sources tell us, her family had nearly given up on Tess after she pulled out of rehab last year -- but when the reality star hit rock bottom after her most recent arrest ... they helped usher her back into treatment.

As for how Tess plans to pay the massive medical bills -- we're told several family friends are pitching in ... and she's expecting a $20,000 check from Sofia Coppola within the month, which should alleviate some financial pressure.

The check is for Tess' role as a consultant on the Burglar Bunch film Sofia is currently developing.

Unlike Demi Moore ... Brooke Mueller IS being treated at the famous Cirque Lodge rehab facility in Utah ... and we're told she's making MAJOR progress in her quest to shake her demons.

Sources close to Brooke tell TMZ ... Brooke checked in to C.L. on December 12. We published a photo of Brooke boarding a plane bound for the Utah facility.

Sources say Brooke is confident this stint will be successful because she made the decision to check into Cirque on her own ... because she wants to get clean ... and not because of pressure from other people.

We're told Brooke's current stint is the longest she's ever stayed in rehab ... and she plans to continue the program for another 30-45 days.

Brooke spent two months in an in-patient program at the Lodge ... but we're told she recently began renting a home in the area and has been moved to an out-patient program so she can begin her transition back to normal life.

Oscar De La Hoya has been as open and forthcoming about his trip to rehab as anyone -- and last night in Hollywood, the boxing legend told us how important opening up about his problems has been to him.

De La Hoya was out at Ripley's Believe It or Not! to support his friend/business partner, Bernard Hopkins, who is fighting tonight at Staples Center in Los Angeles.

Dr. Drew Pinsky hasn't permanently checked out of "Celebrity Rehab" -- the show is currently on hold ... but TMZ has learned, VH1 is keeping Drew on deck for a possible reboot.

As we first reported -- VH1 is taking a break from "Celebrity Rehab" while producers ponder a new show centered around struggling celebrity couples. In the meantime, Dr. Drew is busy with two other TV shows -- a daytime program on CW and another show on HLN.

Howard Lapides -- Dr. Drew's longtime manager and producing partner -- tells us, Drew's exit from "Rehab" is merely a "timing issue."

Dr. Drew Pinsky is officially checking out of VH1's "Celebrity Rehab" ... but VH1 wants to keep rehab alive, so it's developing another show without the good doc.

Sources connected to the show tell us ... the new show will not focus on celebrity addicts, but rather troubled celebrity couples looking to fix their relationship through a therapy program ... on national television.

We're told producers are noodling over names and one of the frontrunners is "Relationship Rehab."

Jeff Conaway died from multiple causes, from Aortic valve problems to pneumonia ... this according to the L.A. County Coroner. And, the Coroner says, his death at 60 was an accident.

Among the causes

-- Septic Emboli ... an infected arterial blockage
-- Aortic Valve Endocarditis ... heart valve infection
-- Coronary Artery Disease
-- Pneumonia
-- Encephalopathy ... brain disorder resulting from drug overdoses

Oscar De La Hoya is opening up about why he checked himself into rehab -- claiming he was abusing cocaine and alcohol, cheating on his wife ... and even considering suicide.

The boxing icon spoke with Univision -- saying, "There were drugs, my drug of choice was cocaine and alcohol. Cocaine was recent. The last 2 years, last 2-and-a-half years and I depended more on the alcohol than the cocaine."

De La Hoya says he's been sober for three months -- but he's still undergoing treatment. He also says he's joined Alcoholics Anonymous.

The boxer says he thought about killing himself, but ultimately decided he did not have "the strength" and "courage" to do it.

Oscar also revealed that he cheated on his wife -- explaining, "We are obviously not talking Tiger Woods here, but I was unfaithful."

One year after Eric Roberts completed a stint in "Celebrity Rehab" for weed "dependency," the actor is back on the pro-pot bandwagon ... releasing a new video in the hopes of legalizing the green stuff.

Back before he sought treatment last year, Eric's wife Eliza explained how the actor "quit drugs and alcohol in 1995" but still had an "interest in weed."

At the time, Eliza said, "He uses marijuana as a medication. He has a prescription ... however, a dependency is a dependency and he doesn't want to be dependent on it anymore."

Now, in a new video for TellDC.com, Eric is making the argument that if booze is legal, weed should be too ... saying, "Alcohol has destroyed whole civilizations whereas pot has only made a few hippies happy."

He adds, "Pot remains illegal because no one has figured out how to make it profitable for the government yet ... it's political, not protective."

So we gotta ask ...

TMZ has obtained the divorce papers, in which Justin Williams states that Kari Ann is pregnant -- and wants a judge to order genetic testing to determine if "this is a child of the marriage." The docs were filed in L.A. County Superior Court by Williams' lawyer Marlo Van Oorschot.

Kari Ann has been treated for sex addiction in the past -- even appearing on "Sex Rehab with Dr. Drew" back in 2009.

The couple has only been married for a few months -- they tied the knot back in February.

Jake -- Gary Busey's son -- was outside a Starbucks in Santa Monica, where he told us about the 21 "awesome" days he spent at a rehab facility ... and revealed that he's been sober for 42 days!