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Mackenzie Shirilla is "literal hell on wheels" -- at least that's how the judge felt about her role in the fatal car crash that killed Dominic Russo and Davion Flanagan in 2022 -- but who is she, exactly?

Whether you've been following Mackenzie's case for years or are just now hearing the hype over Netflix's new documentary, "The Crash," we've rounded up everything you need to know.

Mackenzie was driving her then-boyfriend Dominic, and her friend Davion home around 5 AM on July 31, 2022 when she crashed her car into the brick wall of a building in Strongsville, Ohio.

Byron Allen says late nights on CBS are going to look A LOT different when Stephen Colbert steps aside after Thursday's show ... and he says the key to replacing Colbert will be a comedy show that's light on politics and heavy on timeless, inclusive humor.

The billionaire comedian and media mogul joined us on "TMZ Live" Thursday and told us about his vision for filling Colbert's vacated time slot with a couple new shows.

When Colbert goes dark after his final episode, his weeknight hour on CBS will be replaced by "Comics Unleashed With Byron Allen" and another show Byron produces, "Funny You Should Ask."

Carmen Electra fans hit the jackpot ... because the model just dropped some major news they're going to love.

TMZ caught up with the model and actress Wednesday as she left The Abbey's 35th anniversary party ... and CE revealed she's going to pose for "Playboy" again ... and even came dressed to the bash as a Playboy Bunny.

Even more exciting ... Carmen teased that she might make an appearance in the reboot of "Baywatch" ... which would be epic for OG series fans.

It's time to get a little scared ... and really hot with another round of guess who.

This actress is the newest obsession in the horror community after her breakout performance as a ghoulish GF in a recently released film ... with her performance -- and bod -- catching fans' attention.

This terrifying temptress received widespread recognition after starring in the last season of "13 Reasons Why" playing Estela de la Cruz, before landing the role as Sarah Cushing in "Superman & Lois."

Mackenzie Shirilla wanted to testify in her murder trial, and she planned to tell the jury she was the third victim in a car crash that killed her then-boyfriend and their pal ... at least that's what she told her mom in a phone call from jail.

In undated audio PEOPLE obtained from a jail conversation between Mackenzie and her mother, Natalie, the teenager questions her defense team's decision to keep her off the stand.

Mackenzie tells her mom ... "I was asking him if I could just testify to show them that like, I have nothing to hide, and he was like 'I don't know if that's a good idea at this point.'"

She goes on to say ... "If they see the truth, then they'll know that this was nothing but a car accident. They'll just see that there's a third victim, and it's me, and I lost the love of my life and a good friend, and now I have to deal with this grief the rest of my life."

Spencer Pratt has nailed down another huge supporter ... because Erika Kirk's backing him -- though she won't be able to add to his vote total directly.

Charlie Kirk's widow praised Spencer's run for office in a post to X Thursday ... writing it doesn't matter whether he wins or loses -- he's a true American for even throwing his hat in the ring and hoping to become part of a solution.

Yes, Spencer's running an unconventional campaign, Erika admits ... but she thinks people are gravitating to him because he's not speaking like a career politician -- he's speaking like a citizen who "sees and deeply understands how fragile the simple things in life are when leadership fails."

Jeff Probst says he knew he screwed something up on the live taping of the "Survivor 50" finale when the energy in the room suddenly changed ... and he's explaining how the major blunder unfolded.

The longtime "Survivor" host joined us on "TMZ Live" Thursday and broke down the mistake he made live on air, when he announced the loser of a challenge before viewers saw the results.

Jeff says he was backstage preparing for live interviews with contestants as pretaped segments aired ... he wasn't watching the live finale, and was just a little ahead in the script when he came out to talk to Rizo Velovic.

Former WNBA player Kysre Gondrezick is preparing for a different kinda court over some fake news ... saying anyone who reported she was joining OnlyFans will be hearing from her legal team.

The fourth overall pick in the 2021 draft sent social media into a frenzy this week ... when she claimed a "link" would be added to her bio in 24 hours.

"Link in bio," of course, is a popular phrase used by adult models on X or Instagram (or so we're told) ... leading some folks to think this meant she had created an account on the sometimes X-rated subscription-based platform, especially since she shared the news with a sexy pic.

Matt Brown, one of the stars of Discovery's "Alaskan Bush People," allegedly spiraled during a disturbing YouTube livestream recently ... and now members of his family tell us this is exactly the kind of behavior that led them to distance themselves from him years ago.

Matt appeared nude and allegedly intoxicated while wandering through a public park in Washington state Tuesday, livestreaming himself as he rambled incoherently around town. At one point, he appears to be carrying a gun while continuing to broadcast live to viewers.

Now, family sources tell TMZ ... most of the Brown family cut ties with Matt roughly five years ago after late patriarch Billy Brown ultimately decided the family could no longer support him because of his ongoing alleged struggles. Matt has been public about his battle with alcohol issues.

Gabbie Gonzalez, her dad, and her boyfriend wanted proof Jack Avery was dead, prosecutors claim ... and allegedly asked for it in the form of his pinky finger.

The influencer accused of conspiracy to commit murder appeared in court for her arraignment Thursday ... where prosecutors laid out the grisly claim.

As you know ... Gabbie and her father Francisco were arrested earlier this week after cops say they tried to orchestrate the murder of Avery, with whom Gabbie was locked in a nasty custody dispute.

Britney Spears took more than 3 minutes to pull over once she was hit with police lights during her DUI arrest ... and the wild moment was all captured on highway patrol cameras.

In the alarming CHP footage, obtained by TMZ, it took Brit several beats to pull over once she knew she was being stopped ... because she turned on her blinker.

In the footage, it looked like Brit had room to pull over on the side of the highway, but she kept going ... until she did finally stop -- but it sure looks like she was partially in the lane.

Bam Margera's ex is asking a judge not to change their custody arrangement ... claiming Bam's been in and out of their son's life in recent months -- and alleging in the order that he gave their son a roll-on device from his cannabis line, "BAM THC."

Nikki Boyd filed the documents in court earlier this week in response to Margera asking a judge to grant joint legal custody of their 8-year-old son, Phoenix ... telling the court that Bam hasn't been as present a father in the last six months as he's led them to believe.

Nikki's order states that Margera had 48 weekend days during which he could spend up to 4 supervised hours with Phoenix ... but she says he only visited on 7 of the 48 weekend days ... and only once stayed the full 4 hours!

Another star has weighed in on Spencer Pratt running for L.A. mayor ... and it's none other than Gabrielle Union.

TMZ caught up with the actress Wednesday as she left The Abbey's 35th anniversary party ... and of course, we had to get her thoughts on the topic that has been dominating SoCal headlines.

As you can see ... Gabrielle gets a hearty chuckle when asked what she thinks of Pratt's political ambitions ... before shouting out "Laguna Beach's" Stephen Colletti -- then declaring she's team "LC," AKA Lauren Conrad.

President Trump won't commit to attending his own son's wedding.

Trump was asked Thursday about going to Donald Trump Jr. and Bettina Anderson's destination wedding in the Bahamas, and he told reporters he might be too busy to attend.

POTUS made it clear Don Jr. wants him there ... problem is, Trump says a Memorial Day Weekend wedding is not good timing for him ... what with the Iran War and all.

Trump says he's dealing with "other things" too that might keep him away from the wedding, which he described as a small, little private affair.

11:13 AM PT -- We've obtained dashcam footage from Britney's March 4 arrest ... which shows cops questioning her after pulling her over for allegedly swerving through lanes.

Britney Spears allegedly told cops she'd taken Prozac and Adderall on the day of her shocking DUI arrest and told an officer she could drink four bottles of wine and still take care of him ... this according to the police report.

An officer laid out Spears' March 4 arrest in great detail in the report, starting from when he says he saw a car crossing into another lane multiple times before he turned on the sirens to pull the car over.

According to the report -- first obtained by Us Weekly -- when Spears finally pulled over, after the officer says she initially did not react to his emergency lights, the officer smelled the "distinct odor of an alcoholic beverage" and allegedly observed a wine glass in the car's cupholder.

Bre Tiesi's waving goodbye to Chelsea Lazkani as she rides off from "Selling Sunset" ... and wishing her well too -- just nowhere near The Oppenheim Group.

We caught up with Bre in Los Angeles and asked about the major cast shakeup ... which saw Chelsea, Mary Bonnet, Emma Hernan, and Sandra Vergara being shown the door.

Bre says she'll miss Emma and Mary ... but Chelsea? Not so much.

She's not rooting against her former costar, exactly ... Bre says she hopes Chelsea thrives -- just far, far, FAR away from her.