Justin Bieber & Selena Gomez

Justin Bieber's arrest in Canada for allegedly fighting with a pap following an ATV accident could mean it's time for Justin to do some serious thinking -- about which gang he's gonna join behind bars!

It's never too early to start planning. Y'know ... just in case.

Justin Bieber got arrested in Canada after crashing his ATV into a minivan driven by paparazzi ... TMZ has learned -- and he now faces charges of dangerous driving and assault.

Bieber was taken into custody Friday afternoon in Perth County, Ontario. Police say there was a physical altercation between Justin and a paparazzo in the minivan ... after they had the collision.

Justin was photographed riding the ATV with Selena Gomez Friday in Ontario near his father's home.

Police say Justin was released and will have to appear in court later this month.

He could have a bigger problem on his hands though -- Justin is on probation for 2 years after the egging case in L.A. So, it's possible this arrest could trigger a violation.

Justin's attorney says Justin and Selena are fully cooperating with the police investigation.

With Justin Bieber's history of stupid, dangerous, and illegal stunts -- it's pretty amazing he and Gloria Allred's paths are crossing for the first time ... over his alleged Dave & Buster's run-in with a couple.

Allred tells TMZ she's been hired to represent the couple who claim Bieber tried to snatch a cell phone from them last week in the restaurant/arcade.

We broke the story ... police say Bieber lunged at a guy who snapped cell phone pics of Justin and Selena Gomez.

We spoke to Gloria outside LAPD's Hollywood division, and she described her clients' smoking gun -- video of the incident .. which she says they've turned over to cops.

Law enforcement sources tell us, LAPD has reviewed it for evidence of a crime -- and while it does show JB lunging ... he never makes physical contact.

The Justin Bieber and Selena Gomez re-re-re-re-rekindling is still going strong ... as the couple spent Friday riding around on an ATV in Canada.

The two were spotted riding around in Stratford, Ontario where they each took turns riding on the front of the ATV ... while the other rode behind and held on tight. Considering they are roughly about the same size, it makes sense that they are interchangeable.

Justin Bieber is under investigation for allegedly trying to snatch a cell phone from a guy who snapped pics of Biebs and Selena Gomez at a Dave & Buster's.

If Biebs can't keep chill in a freakin' arcade ... it's a bad omen for the next TWO years while he's on probation! Dude's gotta know better.

Justin Bieber is under investigation for several crimes -- including attempted robbery -- for lunging at a fan at an arcade and sports bar ... attempting to get the guy's cell phone.

Justin and Selena Gomez were at Dave & Buster's Monday night when a fan started taking cell phone pics and video of the two. Law enforcement sources say ... Justin lunged at the guy ... in an attempt to take his cell phone and presumably erase the pics and video.

Justin's security held him back and he never made contact with the fan.

Police were called but before they arrived Justin booked it out of there.

Our law enforcement sources say the fan wants to press charges and Justin is being investigated ... and the possible crimes are attempted battery, attempted theft (stealing the pics) and attempted robbery (grabbing the camera in an attempt to permanently deprive the fan of the pics and video).

Justin could be in big trouble, because he's on probation in the egging case and violating the law could trigger a probation violation which could land him in jail.

We called Bieber's rep. They have no comment.

Justin Bieber's been dropping a four letter word on Selena Gomez -- but it's not the one you're thinking.

Sources close to the couple tell us J.B. and the Gomes spent the entire weekend together ... and it was filled with lots of "I Love You" talk on both ends.

It's been less than a week since they got back together ... but we're told they've already started calling each other boyfriend and girlfriend again.

As we previously reported ... Biebs and Selena went to church together last week ... they say to clean up their acts. Makes sense ...our sources say they did wholesome things like hiking and hanging out at home.

We're told Justin is doting over Selena -- almost like a servant ... and she likes it a lot.

Come and get it.

Barry White would be proud ... Justin Bieber and Selena Gomez can't get enough of their love -- TMZ has learned they're back on for the umpteenth time.

Sources close to Jelena tell TMZ ... the two are trying to work things out. We're told they even went to church together Wednesday night, and they're "trying to be better people."

Not coincidentally, Bieber posted a Bible verse on Instagram the next day that read, "After you have suffered a little while, God will restore, confirm, strengthen and establish you."

They were also spotted at the movies earlier this week and Justin posted (and quickly deleted) a photo that appeared to show Selena kissing his cheek.

Yes ... we're getting ready for a "Justin and Selena Break Up" story. Again.

While her ex and her alleged fling duke it out in Ibiza, Selena Gomez rocked the shortest of shorts Thursday while heading to a meeting in L.A.

As TMZ first reported, while Justin Bieber and Orlando Bloom fought over Miranda Kerr ... there is some tangential Selena involvement.

Our sources say Gomez -- who was once famously photographed with Bloom -- claims she never hooked up with the "Lord of the Rings" star.

Selena Gomez ... hate to see you go, but love to watch you leave.

Selena Gomez says she's never done the nasty with Orlando Bloom ... and she has absolutely zero to do with his raging battle against her ex-BF Justin Bieber.

Sources directly connected to Selena tell us ... the reason she was with Orlando back in March is because their manager organized an event for his clients at We Day in Oakland.

As for the widely-circulated photo of Orlando and Selena at a Chelsea Handler show in L.A. a few weeks later ... it was nothing more than a smoke break. They were actually with their respective groups of friends and happened to be next to each other when the pic was snapped.

And here's Orlando's speech at the same event.

Miranda Kerr's body isn't the only thing that's flawless ... so's her timing, because she was officially made the new face of 7 For All Mankind jeans ... hours after she triggered a celeb scuffle.

The newly released 30-second spot is smokin' -- Miranda not only looks amazing ... she sounds SO hot.

The 7 Jeans campaign slogan is diabolically perfect: "He loves her. She loves him, but he can’t have her. She has the power. She is in control."

Helen of Troy ... so 1190 BC.

8:30 AM PT -- We're getting different versions of what incited Orlando, and people are taking sides. One account is Justin extended his hand to Orlando, who refused it, and when Justin asked what's your problem ... Orlando mentioned Miranda. Justin then tried to walk away and that's when Orlando swung.

A second version -- Justin said something to the effect of, I had sex with your wife ... and THEN Orlando swung.

Orlando Bloom threw a punch at Justin Bieber early Wednesday morning in Ibiza ... and Justin fled the restaurant -- this according to 2 eyewitnesses.

The eyewitnesses tell TMZ ... Orlando was in Cipriani restaurant which was packed with celebs, including Paris Hilton, and Diddy.

You don't see Orlando swing, but the eyewitnesses tell us that's exactly what happened. We're told Justin ducked the punch. That's where the video starts and you hear Justin scream, "What's up bitch?"

We're told when Bieber left the crowd applauded.

The backstory is almost legendary ... Justin partied with Orlando's then-wife Miranda Kerr after a 2012 Victoria's Secret fashion show in NYC and they got very VERY close. And in April of this year, Orlando was hanging out with Justin's on-and-off GF Selena Gomez. So the bad blood is flowing.

Hours after the fight ... Justin threw gasoline on the fire by posting -- then quickly deleting -- this pic of Miranda.

Justin Bieber is going to be grilled about Selena Gomez again because he acted like such a jerk the first time around -- a judge is ORDERING him to sit for another deposition ... TMZ has learned.

According to documents in Miami ... JB will be interrogated by the lawyer in the alleged paparazzi beating case -- the same lawyer who got under Bieber's skin during a March deposition.

TMZ posted the epic video which included Bieber repeatedly shouting, "Don't ask me about her again" ... when the attorney asked about Selena.

The judge's order says Bieber will have to answer questions he refused to answer last time -- for instance ... whether he ever discussed the paparazzi with Selena.

No date's been set yet for take 2 of the deposition -- but we're told it will absolutely be videotaped again.

Justin Bieber and Selena Gomez are desperate to make each other insanely jealous ... at least that's how it looks after they both flaunted their dinner dates with new people.

The first shot came from Selena on Wednesday night when she hit Tao in NYC with 26-year-old model Tanz Watson ... who wasted no time posting a sexy pic of Selena pressed up against him.

Then the Biebs responded last night with his own Instagram of himself and model Yovanna Ventura at dinner in LA with the caption, "dinner for 2 ;)."

Sources close to the exes tell us Justin religiously watches Selena's every move on social media -- so this is no coincidence.

As for who's winning the war -- well, Beliebers have already coined the term, Jovanna for Justin and his new chick.

Your move, Selena.

The stalker who has shown up repeatedly at Selena Gomez' house and actually entered her property has just been ordered to get treatment in a mental health facility ... but the bad news for Selena ... he could be out in as early as 30 days.

Che Cruz pled no contest Friday to felony stalking. He was ordered to a mental health facility where he will be on lockdown for 30 days. After that, he must complete a total of 180 days at the facility, but he's not required to stay there.

The problem, of course ... Cruz is clearly unstable and everything hinges long-term on him finishing the program. And, he's proven already ... once out of custody, he makes a beeline for Selena.

The judge also issued an unusual, 10-year protective order, requiring Cruz to stay 200 yards from Selena. Again ... he's already violated a protective order.