Celebrity Rehab

Usher and Scooter Braun had nothing to say as they arrived back on U.S. soil after spending time with Justin Bieber.

Several photogs peppered both -- especially Usher -- with questions about what is loosely being described as an "intervention."

Not a word from either.

Amanda Bynes' road to recovery includes one big cosmetic change ... removing an angelic tattoo from her body.

Amanda's been working out a ton lately -- hitting the gym and doing some power walking -- and she's also slowly erasing a pair of angel wings from her right forearm.

The tattoo -- which was prominent during her blue wig days -- is faded in recent shots of Amanda walking around her parents' neighborhood in Thousand Oaks, CA ... where she's been living since getting out of a rehab facility last month.

Usher helped make Justin Bieber a superstar, but it's gonna be way harder to get his former protege back on the straight and narrow -- since Justin's yet to suffer any consequences for his actions.

Unless, of course ... chilling on a tropical beach with a hot chick is a consequence.

Dean McDermott's been hitting the bottle in rehab ... but this beverage won't derail his treatment because it looks like it's all part of his plan to get healthy.

Dean left his rehab facility over the weekend for an outing -- with other patients -- and carried his own refreshment ... a healthy bottle of Kefir -- a vitamin-rich fermented milk drink.

McDermott checked himself into a treatment program in L.A. last week for "health and personal reasons" ... and apologized for "the pain" he caused his family -- an apparent reference to reports he cheated on Tori Spelling.

Rehabbing country singer Trace Adkins is back under the influence ... of music -- TMZ has learned, he just bought a sweet new guitar in Florida to write music as part of his treatment.

As we reported, Trace fell off the wagon earlier this month on a country music cruise after 12 years of sobriety -- drunkenly confronting a Trace Adkins impersonator ... and quickly got himself into a treatment facility.

Sources tell us, Trace is currently enrolled in a Florida rehab center ... and his therapist encouraged him to keep writing songs in order to stay focused on positive things.

We're told Trace thought it was a great idea ... and on Saturday, he was escorted by rehab employees to a music store in Lake Worth, FL ... to purchase a used Martin guitar for $1,100.

Rehab never sounded so good.

Justin Bieber is suffering from the same delusion that Michael Jackson once embraced -- putting on a false air of confidence when behind the scenes their lives are falling apart.

You'll recall the scene with MJ back in 2004 ... after his arraignment on child molestation charges. Michael famously jumped on his SUV and waived and smiled, trying to convince everyone things were ok.

Justin did the same thing Thursday as he left jail ... after being busted for DUI and resisting arrest.

As much as both of them protested ... Michael and Justin had the same Achilles' heel -- drugs. Michael was hooked on a pharmacy of prescription drugs, and Justin has an enormous problem with sizzurp.

Justin Bieber's people are asking the singer to come back to L.A. so they can sit with him and convince him to go into therapy ... IMMEDIATELY.

Sources connected with Bieber tell us ... they have been trying to get him into rehab for months, but he has scoffed at the idea -- he won't have a conversation about it and insists he doesn't need it.

So we're told his people believe the next best step is psychotherapy ... to deal with both his drug problem and the underlying issues that have caused it. We're told Justin has not rejected the notion of therapy and is willing to have the discussion when he returns to L.A.

Justin's team have played armchair shrink over the last year, and they believe the root problems involve his upbringing as well as the obvious -- being a child star who grew up rich and famous and got a little too used to it.

Dean McDermott now admits he has some big personal problems ... so he's checked himself into rehab.

A remorseful McDermott seems to be addressing reports that he cheated on Tori Spelling, saying, "I am truly sorry for the mistakes I have made and for the pain I've caused my family."

Dean kind of mysteriously adds, he's dealing with "some health and personal issues."

A radio station in Canada is trying to do what Scooter Braun can't ... get Justin Bieber into rehab ... but the station has a secret weapon.

Hot 89.9 in Ottawa just radioed out to its listeners -- Justin is persona non grata on its airwaves UNTIL he checks himself into a facility to get badly needed help for drug abuse.

So far Justin has laughed off all attempts to get him into treatment.

Sounds good in theory ... but seriously, the guy hasn't had a hit in a while so who's gonna really notice?

Ke$ha's gonna have to find a new art project in rehab ... one that doesn't involve asking her fans to send in their teeth ... because her treatment center tells TMZ they have a strict no-tooth policy.

While Ke$ha is still being treated for an eating disorder, the singer recently had a friend post a message on Twitter asking her fans to send in their chompers so she could "make art" to pass the time.

As weird as it sounds, K's been dabbling in tooth art for a while ... using real teeth in bras, bandanas and various pieces of jewelry.

But a rep for the rehab center tells TMZ ... there will be no canine crafting during her stint in treatment because "We can't accept human remains."

The rep explains, "There is always a risk that it could be of bio-hazardous material so we are not able to bring in anything that's real."

However, the center WILL accept fake teeth ... if her fans wanna round up a bunch of falsies.

So, chew on that.

Justin Bieber is laughing at everyone who is worried about his drug abuse ... because he thinks what he's doing is simply the mark of a 19-year-old ... and besides, it's fun.

People close to Justin tell us ... he's laughing at the stories TMZ has posted about his drug use ... in particular, what has become an out-of-control sizzurp problem. Justin's feeling is that he's young with lots of time on his hands -- as he puts it, "I'm on break." There are no concerts or other obligations on his immediate schedule.

As we reported ... Justin's people have been urging him to get help for what has become a bad drug problem, but he has shut them down.

In fact ... over the weekend, Bieber posted a video on Instagram on an ice rink with the hashtag "worried bout nothing"

Check out the video.

Dennis Rodman's alcohol-fueled meltdown was caused by North Korea ... so claim the people who got the former Hall of Famer into rehab.

Sources connected with Rodman -- the ones who convinced him he needed to check into rehab after his controversial trip -- tell TMZ, from the minute Rodman landed in North Korea he was plied with alcohol.

Rodman claims his bizarre -- arguably unpatriotic comments -- were the result of alcohol abuse and he says the pressure he felt before doing his disastrous interview is why he landed in rehab.

But people close to him say ... the mucky-mucks in the North Korean government were more than happy to supply Rodman with endless amounts of alcohol ... to the point his mind was poisoned.

Justin Bieber had drugs and drug paraphernalia strewn all over his house when it was raided Tuesday ... but drugs were not on deputies' radar ... TMZ has learned.

Sources familiar with the situation tell TMZ ... when L.A. County Sheriff's deputies searched the house ... there were 2 large cookie jars filled with weed in plain view. There were also 4 - 5 empty codeine bottles in the mansion.

There were also 3 bongs -- 1 in the TV room and 2 in the kitchen.

There were styrofoam cups scattered throughout the house that had elaborate drawings on them ... including the names of the people who used them. The cups, we're told, were used for Sizzurp (also called lean) -- which is Justin's drug of choice. We're told he likes to draw on the cups with markers after using them.

And speaking of Sizzurp ... Sprite is usually part of the mix, but we're told Justin preferred pineapple Fanta instead. There were empty Fanta bottles that were discolored ... we're told from the codeine.

There were lots of "swisher sweets" cigars laying around the house -- Bieber's preferred way to smoke marijuana.

And speaking of weed … we're told Justin has a dedicated smoking room in the house, complete with hookah pipes. Sources say when cops showed up ... some of his friends went into the room and some of the illicit stuff went down the toilet.

As for why cops didn't seize any of these items ... law enforcement sources say they were not on the hunt for drugs -- they were primarily looking for video equipment that may have been attached to surveillance cameras. In fact, cops probably couldn't pry and open jars and such, because it would have exceeded the scope of the search warrant.

TMZ broke the story ... Justin has developed a serious drug problem and his people are pushing him to enter rehab ... something he has resisted.

Dennis Rodman is in rehab to treat his never-ending addiction to booze ... TMZ has learned.

Sources connected to Rodman tell us the 52-year old basketball Hall of Famer checked into a treatment center a few days ago in New Jersey ... on the heels of his disastrous trip to North Korea.

We're told Rodman is "beyond exhausted and overwhelmed" ... and he will be in treatment for 30 days.

The Worm has had multiple stints in rehab. Dennis checked into a Florida treatment facility in 2008 ... and in 2009 he appeared on the third season of "Celebrity Rehab." He relapsed shortly after the show premiered.

Rodman blamed booze for his explosion during a recent CNN interview from N. Korea.

Justin Bieber is using drugs with alarming regularity ... and it's making him so erratic his people have been urging him to go to rehab ... sources closely connected with the singer tell TMZ.

Multiple credible, connected sources tell us ... Bieber has been using sizzurp regularly. It's typically codeine and promethazine mixed with Sprite and a Jolly Rancher. Bieber and his crew refer to it as "lean." It's a very dangerous narcotic that can trigger seizures, and even worse.

But that's not the only drug Bieber is using. We're told he's been taking lots of prescription pills, including Xanax, in addition to lots of alcohol and weed.

Our sources insist he does NOT do cocaine and has never done it in his life.

Trace Adkins went nuts on an impersonator during a cruise BECAUSE it was the last straw ... we're told this guy has been a thorn in the country singer's side for YEARS.

The look-alike -- Michael Larsen -- has been following Trace around the country since 2007, sometimes having the audacity to sign autographs, pretending he was the real deal.

Our sources say the tipping point was the cruise to Jamaica. We're told Trace had no idea the guy was on the ship for the first two days. The singer was blindsided and angry when he walked into a bar on the ship and saw Larsen.

Trace has told his people ... he just had it with the guy but probably could have contained himself, EXCEPT for the fact that he was wasted.

Adkins -- who had been 12 years sober -- left the ship after it docked in Jamaica ... and is now in a rehab facility.