Kim and Kyle Richards are being sued by a stylist who claims Kim's pit bull viciously attacked her and Kim refused to call 911 unless the woman lied to protect the dog.

Paige Sanderson says in a new lawsuit -- obtained by TMZ -- she went to Kyle's house in April to help Kim dress for a promotional appearance for 'Real Housewives of Beverly Hills.'

Sanderson says when she saw Kim's pit bull, Kingsley, she became fearful and ran into a bathroom. She says she was assured the dog was docile, so she came out and says Kingsley went ham.

Sanderson says the dog lunged at her, bit and held on to her lower abdomen and crotch, tearing off her leggings and underwear and ripping out portions of flesh.

From there she says it only got worse. According to the lawsuit, Kim refused to call 911 unless Sanderson lied to EMT's by blaming the attack on a stray dog ... not Kingsley.

Kingsley has a history of attacking. The dog bit Kyle's daughter, Alexia, in November 2014, sending her to the hospital. The dog also attacked a dog trainer and an 80-year-old woman.

As for Sanderson, she's suing Kyle because the attack occurred at her house. She wants a ton of money for emotional distress, cosmetic surgery and medical bills. 

The song Calvin Harris wrote for John Newman -- which Calvin says chronicles a love triangle between him, Taylor Swift and her new BF Tom Hiddleston -- just dropped ... and it sure sounds like a play-by-play.

TMZ broke the story ... Calvin wrote the cheating song "Olé" from Tom's POV. But Taylor's camp's calling BS ... saying Calvin wrote the song long before she hooked up with Tom.

The lyrics we said would be in the song are there ... with Tom's famous 'Thor' character, Loki, kicking off the song -- "Low key you won't tell none of your friends about me."  

And ... 

-- "You've hidden my name in your phone so you can call me to tell me you've been going through hell. Left him alone and you booked in a hotel."

-- "I see online that you begun to be a good girl and take trips with your boyfriend. Being attentive, continue to pretend ..." 

Sounds like a hit!

Bill Cosby took the sting out of a major court defeat by getting the hell out of Dodge ... on a private jet.

A dejected looking Cosby boarded the plane after a Pennsylvania judge ruled his attorneys would not be allowed to cross-examine Andrea Constand during the preliminary hearing. His team felt it was Cosby's "constitutional right" to confront his accuser in court.

Cosby is set to stand trial for drugging and molesting Constand in 2004.

His attorneys say they will appeal Thursday's ruling in the state's Supreme Court.

One Clinton down ... Roger, for DUI.

Roger Clinton, Bill's half-brother, has been charged with driving under the influence for allegedly tooling through Redondo Beach last month well above the legal limit.

Roger flunked the field sobriety test and refused to submit to a chemical test, something he's required to do by law. The Redondo Beach City Attorney has also charged Roger with refusal to take the test, which carries a mandatory 48 hours in jail.

It's not Clinton's first DUI. He was popped in 2001.

Take that, Mr. Comey.

The stuntman Tom Sizemore ran over should make a full recovery ... we've learned his injuries were not as massive as first thought.

A rep for the actor tells TMZ the "Shooter" stuntman suffered 2 broken ribs and a wrist ... requiring surgery. A production source backs up the medical assessment.

TMZ broke the story ... Sizemore was behind the wheel when he hit the gas on a Cadillac SUV, running over and pinning the stuntman. He was airlifted to a local hospital.

Production sources say Tom was only supposed to jump in the vehicle ... not drive it. Tom says that's not true ... the scene called for him to drive away.

Tom says producers are not blaming him, and he also says, despite his history of substance abuse, he's clean.

Sharon Stone got super emotional over the deaths of Philando Castile and Alton Sterling.

We got Sharon at LAX Thursday where she drew a line in the sand over how to protest the killings ...