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Chris Brown is still very bitter about his breakup with Karrueche Tran -- so much so, he's going to head-to-head with her manager Jacob York.

Brown started the beef when he saw a pic of one of Jacob's other clients wearing a Chris Brown tee. He reposted it with the caption, "@jacobyork fat ass is gonna have a speech for you" ... knowing Jacob's not a fan of his.

Jacob clapped back, "cocaine is a hell of a drug #davechappelle." Then Chris dropped a diss about Jacob's "commission money he get off da bitches he manage."

This has been simmering since Karrueche and Chris split -- a source close to Chris tells us CB thinks Jacob encouraged her to leave him. Of course, Jacob tells us that's absurd since Chris had a kid behind KT's back.He says, "I think [Chris] needs to keep me out of their personal life and take actions for what he did."

Karrueche finally sounded off too, saying to Chris ... "You're calling me a bitch but screaming my name in a song. Can all this petty s**t stop ... I'm so over the drama."

Guessing the answer is no ... it won't stop.

How can you resist a man like Donald Sterling??

If you're Shelly Sterling, you can't ... 'cause the disgraced billionaire's wife has officially CALLED OFF their divorce ... TMZ Sports has learned.

Donald first filed to end their marriage back in August -- after he called her a "pig" in open court ... after he sued her for selling the Clippers against his will. Good times these two ...

But now, we've obtained court docs that show Shelly asked the court to throw out the divorce papers.

Both Donald and the judge signed off on the request immediately -- which means V. Stiviano's former sugar daddy is off the market.

Sorry ladies ...

Justin Bieber's world tour opener at KeyArena went off without a hitch, with one small exception -- the people who made some of his merch would've bombed in a 3rd grade spelling bee.

One of the t-shirts sold inside the concert had white lettering that read, "Many Are The Plans In A Person's Heart, But It Is God's Purose that Prevails." Ooops.

We found out Bitter Face Vending Inc. was hawking the gear ... but it was printed by a company called Bravado. One "Belieber" told us she dropped $45 for one, but didn't notice the error because of all the mayhem surrounding the booth.

She said she's looking to get refunded and she's in luck.

Bieber's people tell TMZ ... they're aware of the mistake and they've recalled all the bad tees, and anyone who bought one can exchange it for a corrected shrt.

Keith Emerson -- founding member and keyboardist of Emerson, Lake and Palmer -- died late Thursday night. He was 71.

According to our sources, Emerson's girlfriend discovered his body in their home and described the passing as "sudden." We're told Emerson had plans to tour in Japan next week.

Emerson's death was confirmed on the band's official Facebook page ... though no cause of death was given.

Bandmate Carl Palmer released a statement, saying, "Keith was a gentle soul whose love for music and passion for his performance as a keyboard player will remain unmatched for many years to come."

Emerson, Lake and Palmer was one of the most popular progressive rock bands of the 1970s ... and Emerson's solos are legendary.

Bone Thugs-N-Harmony rapper Krayzie Bone was forced to postpone his tour because he's battling the same disease and flu like symptoms that killed comedian Bernie Mac.

Krayzie tells TMZ he suffers from sarcoidosis, an autoimmune disease that attacks the lungs. He thinks he came down with an intense case of pneumonia during a Canadian tour because his sarcoidosis meds weaken his immune system.

His doctors didn't want to take any chances, so they ordered Krayzie to cancel the rest of his gigs and head back to L.A. for treatment.

The rapper expects to make up the missed shows once he recovers.

A Donald Trump protester -- who happens to be black -- got knocked to his ass by a white Trump supporter, and now cops have arrested the attacker ... TMZ has learned.

The video from the Wednesday rally in Fayetteville, NC shows an unidentified supporter in a cowboy hat totally sucker punch a protester who was already being escorted out of the venue.

Officers, who observed the hit, reacted quickly, but slammed the protester down on the ground -- not the puncher.

We've learned police did not arrest the victim, but did kick him out of the event. As for the punching cowboy -- we've learned he's 78-year-old John McGraw, and he's currently in police custody. According to cops, McGraw voluntarily came in Thursday morning to be interviewed ... and that's when he was arrested.

We're told he's being booked for assault and disorderly conduct. He's scheduled to appear in court April 6.

Cordell Broadus has met with UCLA football coach Jim Mora and has been given permission to rejoin the football team after quitting back in August ... UCLA confirms.

Justin Bieber is not as smooth as Tennessee whiskey -- or scotch for that matter -- because he bailed on a $130 bar tab after a heated exchange that nearly turned into a bar brawl.

Justin kicked off his tour in Seattle Wednesday night, but on Sunday night he and 7 pals hit up The Whisky Bar and ordered a round of shots. Sources at the bar tell us they asked for a mid-range blend and got GlenDronach ... a 12-year-old single malt scotch, $15 per shot.

We're told the group went out for a smoke and never came back to pay the bill, but they were all caught on surveillance cams.

One member of JB's entourage tells us trouble started when a female fan wanted a pic, but was denied by one of Bieber's dancers. That's when a guy with her got pissed, and started yelling and making a scene. We're told Justin's group decided it was best to get outta Dodge before a fight started.

Our source says one of Justin's bodyguards was supposed to pay, but obviously didn't in the chaos. We're told they settled up with the bar Wednesday night.

Bottoms up.

Bow Wow got the worst birthday present ever -- an egging, which his crew thinks came at the hands of his ex-girlfriend Keyshia Cole ... as breakup revenge.

Bow Wow tweeted early Wednesday that "one of his exes" egged two luxury cars parked outside his home -- fortunately for him, the culprit messed up and yolked his friend's rides. That friend posted pics of the damage and pointed the finger at Keyshia.

But Cole tells TMZ she had zero involvement in the incident, and called out Bow Wow on Twitter for "snitching."

Our sources tell us Bow Wow and his crew are adamant the egg hit was meant for Bow Wow, not his pal, and think Cole is retaliating against him for ending their relationship.

Former Eagles member Randy Meisner has been cleared in the bizarre shooting death of his wife.

As we reported, Lana Meisner died Sunday night from a gunshot wound ... this after she had called 911 an hour and a half earlier to report domestic violence. She claimed Randy was waiving a BB gun.

LAPD detectives have concluded she accidentally shot herself. It seems weird, because police say she was "moving a rifle that was stored inside the closet" when it accidentally went off. It's a little odd as to why she would be "moving" a rifle less than 2 hours after calling 911, reporting domestic violence.

The wild game hunter Miley Cyrus bashed on social media says the singer opened the floodgates -- 'cause now she's getting hit with death threats.

Rebecca Francis says the threats have been nonstop since Miley started reposting pics of Francis posing with big game kills. Miley captioned one of them, "What the f*** is wrong with the human race?" She also shared a pic of Francis posing with Donald Trump, saying she was "scared for our country."

Some of the death threats include, "F******g bitch, I wish I could hunt you" ... and "I hope someone shoots you." Francis tells us she thinks Miley's cyberbullying of her is "way worse than what [Miley] is accusing hunters of doing."

She adds she's had to make her Instagram account private to shield the haters.

The next 'Bachelorette' has yet to be announced, but there's a strong sign Ben Higgins reject Caila Quinn is getting the nod.

Quinn, who was eliminated from "The Bachelor" on Monday's episode, was spotted shooting something Wednesday around her hometown of Hudson, Ohio. Cameras followed her to local spots including her alma mater, Western Reserve Academy.

She was also seen sitting alone inside a gazebo looking pensively into the distance -- which has all the makings of a classic 'Bachelorette' intro scene.

We're told onlookers were asked to sign release forms to appear on television, and although the crew didn't specify what show they were shooting for ... there are reports Caila is the chosen one.

Nate Diaz did NOT suffer a hand injury during that violent stand-off with Conor McGregor at the UFC 196 presser Thursday ... with sources telling us Nate is "ready to fight."

After Conor smacked Nate's fist, people noticed Nate clutching his right hand ... and several media outlets speculated that he suffered an injury that could put the fight in jeopardy.

But deeply connected sources tell us, "Nate is fine and ready to fight ... he didn't even see a doctor because he wasn't hurt."

Translation -- the fist escaped unscathed.

IT'S (almost) TIME!!!!

Celine Dion is looking to sell and sell quickly -- she's slashed the asking price on her resort-like home on Jupiter Island, Florida ... to $45.5 million!

Yeah, ya still gotta break the bank to buy it, but the price is now a whopping $30 million less than Celine's original price when she first put it on the market in 2013 ... shortly after her husband, Rene Angelil, was diagnosed with cancer.

We're told Celine and Rene discussed unloading the home before his death ... and she's now planning to live full-time in Las Vegas to do her Caesars Palace show, and because her kids are comfortable there.

The 5.5 acre Florida estate has 3 pools -- one with a fire pit in the middle of it, and another with a water park and lazy river. The home itself is 10,000 square feet with 5 bedrooms, but there are also 2 guest houses (4 bedrooms each) ... as well as a tennis court and a simulated golf range.

The owner of the Washington gym Kam Chancellor was scouting out Wednesday night tells TMZ Sports he has reached out to the Seahawks star to explain why his employees called police on him ... and says he still wants to make a deal.

If you haven't heard ... Chancellor says he was scouting the Redmond Athletic Club last night because he was interested in buying the place -- and went to the building with friends to check it out.

Problem was ... the gym was not open and staffers inside called police because they were concerned.

Kam tweeted, "They told the cops I was trying to rob the place because I was looking into the glass asking for help."

Many people believe the call to cops may have been racially motivated because Kam is black.

But we spoke with the owner of the gym, Ryan Neal, who tells us, "We have reviewed the situation and can assure you that race was not an issue here."

Neal says the gym has recently had attemped break-ins and the staff was told to call cops if it appeared anyone was trying to gain access to the gym while it was closed.

Neal says he has reached out to Chancellor -- and says he would love to talk business if Kam is still interested in buying the gym.

Oklahoma City Police say suicide has NOT been ruled out in the fiery car crash that killed OKC Thunder co-owner Aubrey McClendon ... TMZ Sports has learned.

As we reported ... McClendon died when his car smashed into a bridge at an incredible high rate of speed Wednesday morning ... hours after he was indicted on a federal conspiracy charge that carries up to a 10 year prison sentence.

We spoke with OKC Police Dept Captain Paco Balderrama who told us ... cops are working on several possible theories that led to his death -- ranging from suicide to a medical episode behind the wheel.

"Anything is possible," Capt. Balderrama said ... "At this point we just don't know."

Cops say McClendon was NOT wearing a seat belt at the time of the crash -- and he made no attempt to slow down before impact.