Justin Bieber & Selena Gomez

Justin Bieber can be insulting, arrogant, snotty, ignorant and disrespectful ... and all in one sitting -- because that's exactly what he was like during his deposition last week in the lawsuit where his bodyguard allegedly beat up a photog.

TMZ obtained a copy of the entire 4 1/2 hour, videotaped depo ... and it's just unreal. We've boiled it down to what we think are the best 4 clips.

1. ARROGANT BIEBER -- He just can't hide his contempt for the photog's lawyer, and it comes out in pretty awful ways. We put some snippets together and you'll get the idea. It represents his attitude throughout the depo.

2. LOVESICK BIEBER -- Selena Gomez is clearly a hot button, because when the lawyer asks about her, everyone goes nuclear. Bieber eventually rips his mic off and he and his lawyer storm out.

3. CONTENTIOUS BIEBER -- He compares his interrogation to being grilled by Katie Couric or "60 Minutes." Simply hilarious.

4. DISRESPECTFUL BIEBER -- When asked if Usher discovered him, Bieber disses his mentor and says he was actually discovered on YouTube. The best part ... he clearly was trying to say he himself was instrumental in his success, but instead he says, "I was detrimental to my own career."
Truer words have never been spoken.

Justin Bieber and Selena Gomez got hot and sweaty for a few hours Friday afternoon in Texas ... and they even had someone watch -- but it wasn't the cuckold you're imagining.

J.B. and Selena hit up Action Dance Studio in McAllen, TX yesterday after their coffee date ... spending 2 hours in a private rehearsal space with a choreographer.

The door was covered with a plastic mat during the sesh ... and security stood guard. The owner says the couple seemed "really close and into each other."

What we don't know ... why there were in a dance studio.

Justin Bieber and Selena Gomez are back at it again -- eyewitnesses tell TMZ, the on-off-on-off-again couple has been canoodling all morning in Texas ... hitting up a Starbucks together and a local breakfast joint.

Selena Instagrammed the Starbucks photo about 15 minutes ago -- and sources inside the Starbucks tell us Selena was there with Bieber in the last hour.

Bieber and Selena were also spotted leaving a place called Royal Perfume. Sources inside the store tell us, Bieber bought 2 colognes (Obsession by CK and Pour Homme by Givenchy).

Selena's performing Saturday night in Hidalgo, TX -- 15 minutes from the McAllen, TX Don Pepe's she just hit up with Justin for breakfast. It's unclear if Justin bee-lined from Miami to Hidalgo just to see Selena, but it definitely appears that way.

Bieber has no other reason to be in Texas -- Usher is performing Saturday too, but that's 5 hours away from Hidalgo.

As we reported, Bieber stormed out of his deposition in Miami Thursday after lawyers for the photog who's suing the singer grilled him about Selena. He refused to answer any Selena questions.

Justin Bieber lost his cool under oath Thursday, when a lawyer started peppering him with questions about Selena Gomez ... TMZ has learned.

Bieber sat for a 4 1/2 hour deposition in Miami in connection with a lawsuit filed by a photog who claims last June Bieber sent his hired muscle to beat him up.

The contentious lawyer for the bodyguard drilled Bieber on a variety of subjects, but things spun out of control when Selena Gomez was raised.

The lawyer started asking if Selena was present during any incident involving fights with photogs. Bieber's lawyer, Howard Weitzman, felt the lawyer was just trying to get a rise so he objected. But the lawyer persisted and asked again ... Bieber was fuming and Weitzman jumped in and said his client was being harassed.

The photog's lawyer asked about Selena again, and at that point Justin and Weitzman stood up and left, and as Justin was leaving he screamed, "Don't ask me about her, do not ask me about her!"

Five minutes later they returned but things got even hotter. At one point Bieber responded to a question with the word "Yeah." The lawyer said, "Do you mean yes?" To that Bieber responded, "What the f*** is the difference between yeah and yes?!"

A short time later Bieber fired back, "What is this, "60 Minutes?" At another point he responded to a question by saying to the lawyer, "OK Katie Couric, what's your question again?"

And even TMZ got in the act. The lawyer showed Bieber multiple TMZ posts, and the singer accused the lawyer of having an obsession by constantly surfing TMZ for Bieber stories.

And finally ... the lawyer asked Bieber if he has a prescription for Xanax, and Bieber responded, "No."

Selena Gomez isn't falling for Justin Bieber's old tricks anymore ... she's exercising her rehab knowledge and slamming the door shut on any future relationship.

Sources close to Selena tell us ... Selena scoffed at Biebs' Instagram photo of her at an Oscars party with the caption, "Most elegant princess in the world." Sorry J.B. ... we're told she laughed out loud when she saw it, saying it was stupid and childish.

Selena's party line ... she went to rehab to get over Justin and it worked. The reality ... she went to rehab for booze and weed. Good luck, Selena.

Justin Bieber just can't quit Selena Gomez ... he lustfully posted pics of his ex-GF at an Oscar party ... even though he's 2000 miles away in Atlanta

The pic shows Gomez at the Vanity Fair party last night in West Hollywood -- where she showed up in a gold, beaded Pucci gown -- with the caption, "Most elegant princess in the world."

Could be Justin's just jonesing for his old life in L.A. -- which once included Selena?

The feeling may not be mutual ... Gomez -- who went to rehab in Jan. partly over her Bieber addiction -- has kept her distance from Justin and his new crew.

Selena Gomez is hitting the bottle hard after bailing from rehab just weeks ago.

Selena proudly re-embraced alcohol by posting this happy hour selfie on Instagram. We've confirmed there's booze beneath that whipped cream.

TMZ previously reported ... Selena checked into The Meadows last month to rid herself of alcohol, weed and Ambien ... and Justin Bieber. She bailed 2 weeks into the 45-day program to go to Sundance and then said she was cured so she didn't need to return.

Selena's rep claims she's got no problems handling her liquor. But when you're calling your cocktails "dessert before dinner" ... you may want to think about the next 12 steps.

CHEERS! Selena Gomez wants her fans to know she appreciates all the support she received during her rehab stint -- where she went for alcohol abuse -- and she's showing her love ... with a glass of wine.

TMZ broke the story ... Gomez bailed early on rehab -- where she also sought treatment for pot and Rx Ambien -- just 14 days into a 6-week program ... in order to attend the Sundance Film Festival.

Much to the rehab facility's dismay, Selena decided not to return to treatment because -- as she told her people -- she felt as though she was cured.

Now she's thanking her fans for all their love on Instagram -- with the most ironic photo ever -- writing, "I've done everything I could to the best of my ability. Thank you for the unconditional love and cyber hugs. You inspire me."

The pic -- showing Selena holding a glass of wine of all things -- was snapped about 6 months ago while she was on a boat, so it's not like she's fallen off the wagon ... it's just a hilarious picture to post given the circumstances.

Justin Bieber is scoffing at Selena Gomez, telling friends she has no one to blame but herself for her addictions ... TMZ has learned.

Sources with daily Bieber contact tell TMZ ... Bieber and his friends are laughing at Selena's "bad influence" claims, because they say she's always the drunk at the party. Bieber acknowledges he gets wasted, but whenever he had parties Selena was downright competitive ... smoking as much weed as the guys and sometimes outdoing them. They say she was also HEAVY into booze.

We're told Justin believes Selena's parents are behind the blame game, because they HATE him. He thinks they are fueling Selena's anger and making him a scapegoat.

Justin says he's happy he's no longer with Selena because she's just too high maintenance ... and out of control.

Selena Gomez ignored the advice of medical professionals and waltzed out of rehab just 14 days into a 6-week program ... over the strenuous objections of the rehab staff ... TMZ has learned.

Sources close to Selena tell us just after New Year's she checked into a program at The Meadows called DAWN -- for alcohol, pot and Rx Ambien -- in addition to what her people believe is an unhealthy union with Justin Bieber.

But 2 weeks in, Selena bailed so she could go the Sundance Film Festival for her upcoming movie. She told her people she would return to the rehab facility after Sundance, but when it was over Selena decided she was cured and there was no reason to return.

Problem is ... that's not the way the medical staff at The Meadows sees it ... the treatment program is 45-days and Selena bailed four weeks early. We're told the staff feels it's essential in any recovery to complete the therapy.

Selena is telling her people ... she completed the toughest week, which the facility calls "Survivor's week" so everything is fine. Thing is ... Selena's not the doctor -- she's the one with the problem.

Selena Gomez went to rehab last month ... and sources connected with the singer say she blames Justin Bieber for her predicament.

We've learned Gomez went to The Meadows in Arizona for 2 weeks of treatment.

Sources say Selena went for a combination of problems, including alcohol, pot and prescription Ambien. She's also addicted to Justin Bieber.

We're told Selena's decision was largely based on "that crazy boy" -- aka Bieber. Selena blames a lot of her problems on the excesses she was exposed to by being around Bieber and his buddies.

Sources close to Gomez tell us ... people in Selena's camp went ballistic when they found out she was hanging out again with Justin ... and saw photos of her joyriding with him on Segways. We're told that was the final straw -- she checked into rehab immediately after that.

The 2-week treatment was part of a program called DAWN at The Meadows ... specifically designed for people between 18 and 26. DAWN specializes in substance dependence, trauma, family dynamics, mental health and relapse prevention.

We're told Selena is not getting outpatient help now nor is she in therapy.

Selena Gomez can pound sand. Justin Bieber's new girl stuck by his side in Miami the night after his DUI arrest ... and emerged this morning for a pretty epic walk of shame.

As we reported, self-proclaimed model Chantel Jeffries was riding shotgun in Bieber's yellow Lamborghini when he was popped for DUI.

And clearly, it was more than just a random hookup ... Chantel crashed with Bieber in his rented Miami mansion just hours after he was released from the pokey.

Meanwhile, Selena was out on the town in L.A., smiling and signing autographs for fans.

Selena Gomez sought out the paparazzi Thursday night -- gleefully parading into a fancy West Hollywood restaurant on the heels of her ex-boyfriend's arrest.

Selena and dinner date Demi Lovato were grinning ear-to-ear as they were exiting Craig's restaurant ... more than willing to mug for the cameras as they signed autographs for fans.

There's NO doubt ... Selena wanted to be seen, after Justin Bieber and his date Chantel Jeffries were pulled over in Miami Beach earlier in the day and J.B. was popped for DUI and resisting arrest.

Justin Bieber's DUI arrest has NOT cost him the support of a major sponsor ... TMZ has learned Adidas is standing by him -- for now.

The athletic shoe company tells TMZ, "Nothing is changing in our relationship with Mr. Bieber at this time" ... which sounds like they're leaving that door open.

Bieber signed a big endorsement deal with Adidas back in 2012 -- he and Selena Gomez are the celebrity faces for the company's NEO line.

The Biebs earned about $58 million last year ... a good chunk of that from deals he made to hawk sneakers, headphones, nail polish, makeup, a prepaid credit card and the acne cream, Proactiv -- which paid him about $3 mil until that deal ended.

None of those other companies -- as far as we can tell -- have made any move to ax Bieber.

And judging by that mugshot ... maybe he shoulda stuck with Proactiv.

Justin Bieber and Selena Gomez roughed it in the wild over the weekend ... and by roughing it we mean their accommodations weren't quite as nice as the Four Seasons.

The couple that decided love can really work the 11th time around went "camping" near the beach in Santa Cruz, CA ... in an uber-luxury RV at the upscale KOA Kampgrounds.

The kids had a chaperone of sorts ... Justin's dad, with bodyguards in tow.

The price was sure right to park the Prevost RV -- $65 a night. BTW ... the RV -- which retails for anywhere between $1.5 - $2.5 mil -- is owned by Chris Brown and it has a big master bedroom, a kitchen, living room and, of course, lots of video games.

JB and Selena spent the day jumping on the camp's trampoline and tooling around on Segways ... in other words, their feet never touched dirt.

Best part ... after they left campers found pieces of Segways.

At least they didn't go off the cliff.

As we previously reported ... Selena hadn't been spotted with JB for months until earlier this week.