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"Real Housewives of Atlanta" star NeNe Leakes says it doesn't matter they're all on a reality show -- if Kenya Moore and Claudia Jordan don't zip their lips she'll sue.

Both Moore and Jordan got warned by Leake's lawyers Tuesday to stop damaging her brand with smack talk. NeNe's pissed at Jordan for calling her bipolar and, even worse, sporting bad veneers. Her beef with Moore is unclear.

Two things strike us. It's a little "pot calling the kettle black" because NeNe's been known to go after other cast members ... por ejemplo saying Claudia was such a tramp "her clit has left her body."

And you gotta wonder what producers think about their stars setting limits on the drama.

JaMarcus Russell might've finally given up on his NFL dreams, but his dreams of living like a boss look very alive 'cause TMZ Sports has a pic of the former #1 overall pick hanging with one of the biggest stars in rap ... Rick Ross.

The two hung out on January 16th after Ross performed the same day at the Nightown nightclub in Destin, Florida. We're told Russell -- a HUGE fan -- heard about the show and drove all the way in to chop it up with Rozay.

Judging from the pic, the two seemed to hit it off -- and had a great time while partying with several bottles of Ross' Luc Belaire Rare Rose.

Here's the thing ... Russell has struggled with substance abuse in the past (sizzurp) ... and also had a close call with foreclosure -- so it's interesting to see him balling out with booze and a fancy piece of jewelry on his wrist.

On a more hilarious note -- the reason why Russell is partly cropped out of the picture is because the woman who took the photo is Julia Beverly -- the founder of Ozone Magazine and Pimp C's biographer -- and she didn't know who he was.

Engaged WNBA stars Brittney Griner and Glory Johnson are 6'8" and 6'3" respectively, so when it came time to find a wedding gown ... they needed help from the folks at "Say Yes to the Dress: Atlanta."

And it wasn't easy. According to our sources, it will actually be Johnson who will be wearing the dress ... while Griner will go with a suit.

During the taping of the episode, set to air Friday on TLC, we're told Glory had to try on a bunch of dresses to find one that fits right ... cause most brides didn't average 9.2 rebounds/game last season.

Melissa Rivers has just filed a huge lawsuit against the clinic where Joan Rivers' heart stopped beating ... and Melissa's lawyer says the doctors acted like a bunch of groupies and not medical professionals.

The lawsuit -- obtained by TMZ -- claims gross medical malpractice, alleging during the 20 minutes doctors tried to bring Joan back to life, they didn't think to perform a tracheotomy, which facilitates breathing.

Melissa says, "The level of medical mismanagement, incompetency, disrespect and outrageous behavior is shocking and frankly, almost incomprehensible," adding, "Not only did my mother deserve better, every patient deserves better."

In addition to suing the clinic, Melissa has sued Joan's personal doctor, Gwen Korovin. According to the lawsuit, she should not have been permitted in the room where the procedure was being performed, yet she jumped in and announced, "I'll go first."

The suit claims another doctor took cellphone pics of Rivers before the emergency, while she was under sedation, with Korovin in the photos, saying Joan "will like to see these in the recovery area."

According to the lawsuit, Korovin left the room in the middle of the emergency and the allegation is that she left because she knew she wasn't supposed to be there in the first place and "wanted to avoid getting caught." The suit says Korovin simply abandoned Joan.

And get this. According to the suit, in the middle of the emergency, another doctor took issue with a colleague who wanted to scope the affected area, saying, "Renuka, you're such a curious cat. You always want to know what's going on." The suit says the doctor refused to authorize the scope.

Melissa's lawyer spoke to The NY Daily News, which broke the story, and quotes lawyer Jeffrey Bloom who says, "Had doctors acted as physicians for Joan Rivers instead of groupies, Joan Rivers would have been doing 'Fashion Police' last week."

Yorkville Endoscopy has been under intense scrutiny and they are set to lose their accreditation at the end of the month.

Ain't nothin' like an original ... Jeana Keough is coming back to "The Real Housewives of Orange County" -- but she'll be a part-time cast member ... for now.

Jeana's been shouting from the rooftops about her return to the show she left in 2009 -- but production sources tell TMZ her camera time will be limited to start the season. We're told Bravo execs want to see if fans are still into Jeana ... before they go all in.

Of course, 'Housewives' fans remember Jeana for her epic fight with Tamra Barney -- one of the greatest in reality TV history -- and we're told things might get dicey again between them this season.

Just a hunch, but a rematch would probably cement a full-time role for Jeana. When it comes to the 'Housewives' ... if it bleeds it leads.

NFL Pro Bowlers might be bad asses on the field -- but when it comes to exotic reptiles, they're giant wussies ... and TMZ Sportsgot pics to prove it.

Antonio Cromartie, Drew Brees, Golden Tate, Chris Harris Jr. were among the players at a Pro Bowl welcome party at the Biltmore Hotel in Phoenix Thursday night -- and came face-to-face with giant snakes, lizards, and alligators.

The Phoenix Herpetological Society brought the creatures, and its prez Russ Johnson tells us most of the players hung back while their wives and kids rushed to pet the animals. He adds some NFLers did eventually come over ... after a couple drinks.

Liquid courage never hurts.

The Beastie Boys say they can't find work because of MCA's death ... and they're so strapped for cash they can't even fight in court without someone covering the bill.

Here's the dilemma ... The Boys have beef with Monster Energy, which jacked some of their songs for an ad campaign. The guys actually won their case and scored a $1.7 million judgment. But a lot of that was eaten away by their lawyers, and they want Monster to foot that bill.

The surviving members say -- since Adam "MCA" Yauch died from cancer in 2012 -- no one wants them anymore so every dollar counts. And they're on the hook to their lawyers for a whopping $2.4 MILLION in lawyers' fees.

A judge hasn't decided yet, but typically the side that wins in cases like this gets at least some of their lawyers' fees back.

Middleweight boxing champ Jermain Taylor saved Arkansas cops the trip -- turning himself in today for his SECOND gun-related arrest in just 3 days.

The 36-year-old Taylor was arrested Monday for felony assault after allegedly firing 2 shots during an altercation at an MLK Day parade. That bust violated the terms of his jail release for ANOTHER case ... where he is accused of shooting his cousin.

Cops say Taylor flagged down a Little Rock patrol car ... told cops his situation, and then he was hauled off to jail. Again.

"Wicked Tuna" star David Marciano does NOT have a way with women -- he was arrested for allegedly grabbing a hotel employee by her hair ..in a flirting move gone awry.

According to cops in Morehead City, North Carolina -- the town where "Wicked Tuna" is filming -- Marciano was busted for assault around 1:10 AM Monday. Police say Marciano grabbed the woman's ponytail in a lame attempt to get frisky ... but it wasn't well received.

Marciano was arrested for assault ... the employee told police he seemed intoxicated, but cops think he was sober ... which presumably makes it worse.

The show is standing by their star ... no plans to 86 him, but a show rep tells us they're still taking the arrest seriously.

The new-and-improved Justin Bieber continues his march through L.A. ... this time popping up and doing a random acoustic guitar set at a West Hollywood hot spot ... and he was good.

It all went down Tuesday night at State Social House ... the same restaurant where Bieber crashed a gay Republicans meeting.

We're told Biebs spontaneously grabbed a guitar and hit the stage. He sang four songs and as you can tell from the video ... there was no Belieber craziness -- just a guy singing some tunes.

As TMZ previously reported, Bieber has changed dramatically over the last few months ... and he actually wanted to be roasted by Comedy Central to put the past to bed and move on as an adult.

Check out the video. It's good.

Former UFC heavyweight fighter Dave Herman was hit with a taser during an arrest in Indiana this week ... and now Dave's wife has released the video she shot during the incident in which she calls out the police.

Cops say Herman had been speeding with no headlights or taillights -- and when they tried to pull him over, he led them on a 3 mile chase before finally stopping at a gas station.

During the stop, cops say Herman "approached Officers in an aggressive manner" -- so they fired the taser to take him into custody.

But Herman's wife Madeleine -- who was in the car at the time with their young son -- tells TMZ Sports she's FURIOUS over the incident and claims her husband is the real victim.

Madeleine says Dave was NOT trying to run from cops when they initially tried to pull him over -- they were merely looking for a well lit place to stop.

As for allegations Dave was being aggressive, Madeleine says that's also BS -- explaining, "Dave, not wanting armed strangers walking up behind the vehicle, especially with our infant son in tow, stepped out of the vehicle and asked them if there was something he could help them with."

Madeleine says cops overreacted and violently took her husband to the ground. He's being charged with several criminal counts including resisting arrest and battery against an officer.

Dave is still in custody -- but she's calling for the officers involved in the arrest to be charged with assault.

BJ Penn slammed his head against a solid wooden bar 3 times in anger ... before the ex-UFC champ went outside and got into a fight this weekend ... bar sources tell TMZ Sports.

We're told ... BJ was a "perfect gentleman" when he arrived to the South Shore Tiki Lounge in Maui on Saturday night -- but became agitated and at one point began banging his head into the bar.

"He was definitely aggravated at something," one source tells us who also says Penn did NOT appear to be drunk.

"He only had one drink. At first he was okay, then he was hitting his head on the bar .... and 20 minutes later he was outside fighting."

As we previously reported, Penn allegedly attacked one of his friends in the parking lot -- and reportedly injured the guy so bad, he was hospitalized for a broken eye socket.

Darren Shahlavi, who appeared in popular TV shows including "Mortal Kombat: Legacy" and "Arrow," died of an apparent overdose ... TMZ has learned.

Shahlavi was found dead January 14 at his L.A. home and law enforcement sources tell us ... it appears he overdosed on prescription meds.

We're told the 42-year-old actor sadly had a history of drug and alcohol abuse.

He pursued a stunt career in Hong Kong in the '90s and eventually came to the U.S. to pursue acting.

In addition to the various shows, Shahlavi starred in the 2012 TV movie "Aladdin and the Death Lamp." He also had a classic fight scene in the cult movie "Ip Man 2."

We're told the L.A. County Coroner is conducting toxicology tests before determining the exact cause of death.

"Arrow" star Stephen Amell -- who fought Darren on the show's first episode -- called him a "great dude & a patient, thoughtful partner."

8:30 AM PT -- The roast was Bieber's idea! We've learned Justin actually called Comedy Central to say he wanted the roast to be a celebration for his 21st birthday ... which is March 1.

Like a tattooed lamb to the slaughter, Justin Bieber has agreed to be the guest of honor at a Comedy Central Roast in March ... and you can already hear Jeff Ross licking his chops.

Ryan Seacrest broke the news on Twitter ... saying, "Yes I got confirmation @justinbieber is getting roasted by @ComedyCentral in march...love u justin but it's time lol #BieberRoast."

Word on the street is that Bieber was game to be roasted for a while ... and had been hoping to work out a deal with the network.

Now, it seems like everything's a go ... and it'll be interesting to see which comics come out to burn Bieber.

As for roast topics, it's not like there's a shortage of material, for example:

-- Pissing in mop buckets
-- Egging houses
-- Lambo arrest
-- Fighting Orlando Bloom
-- Dropping the N-word
-- Calvin Klein modeling shots
-- Anne Frank shout out
-- Push-ups in jail
-- Fighting with Keyshawn Johnson
-- Fear of shirts
... and oh yeah, his music career.

Careful what you wish for.

Mama June might give Sugar Bear one last chance to work things out -- and she might get PAID to do it ... on a reality TV show.

Sources connected to the now ex-couple tell us they've been contacted by 2 different shows -- one of them being "Marriage Boot Camp" on WE tv -- looking to cast them for an upcoming season.

We broke the story ... June kicked Sugar Bear out of their home last week ... claiming she found out he was two-timing her with several women he'd met online. We're told the marital strife is the real deal -- not created for TV -- but June intends to follow through and meet 'Boot Camp' producers.

She's just not sure Suge will do the same.

Michael Sam clearly wanted to make a statement when he proposed to his longtime BF -- 'cause the football player popped the question right in Vatican City.

Sam posted the pic ... which shows HE was the one who got down on one knee and popped the question to Vito Cammisano last week.

We're told Sam and Vito were inside St. Peter's Basilica at the time.

It's sort of an act of defiance ... considering the Catholic church is still anti-gay marriage.

Mazel!