SXSW

Lil Yachty's crew got into a brawl at SXSW ... with themselves.

We got video of Yachty's bodyguard beating down a guy who is part of the rapper's entourage ... or at least he was. The fight went down Friday at the Omni Hotel in downtown Austin.

The clip starts with punches being thrown and Yachty standing nearby and watching the action unfold.

Law enforcement sources tell us police responded to a disturbance at the Omni, and investigated a fight in the lobby. The dude who got crushed is reportedly Thouxanbanfauni, a rapper who's been Twitter beefing for days with Yachty.

Tyler the Creator was arrested Saturday afternoon at an airport in Texas ... after cops say they had a warrant with his name on it -- for starting a riot at the SXSW festival.

Austin PD officials say Tyler was booked this afternoon for inciting a riot at his concert Thursday.

Cops released a video of the riot (below) -- and Tyler is clearly telling everyone to break down the barricade to get in. The scene is pretty scary.

As you may recall, Tyler's concert was cancelled the night before -- after a driver plowed into a crowd of people waiting to get in -- leaving 2 dead and 23 injured.

According to the warrant ... a bartender at the facility told police he tried protecting a woman from getting trampled on ... but a guy punched him in the face for it.

Tyler's still in custody on a $3,500 bond.

Demi Lovato -- who's struggled with an eating disorder for years -- says Lady Gaga's puking stunt at SXSW was despicable because it glamorizes a terrible disease in the name of art.

Lovato just laid a thick amount of shame on Gaga via Twitter ... saying "Sad ... As if we didn't have enough people glamorizing eat [sic] disorders already."

Demi adds, "Putting the word ART in it isn't a free card to do whatever you want without consequences."

Lady Gaga's antics are sometimes vomit inducing, but this is ridiculous ... last night at her SXSW show, she actually let some chick VOMIT ALL OVER HER while she performed.

The vomiter is no amateur ... she's actually a "vomit painter" (actual profession) named Millie Brown, who is known for drinking various liquids and then vomiting them up onto a canvas. In this case ... the canvas was Lady Gaga.

Gaga was playing drums on a song called "Swine" when Brown, after drinking neon green liquid, proceeded to stand over her, stick her fingers down her throat, and vomit the green liquid all over Gaga.

Two people were killed and 23 more injured after a suspected drunk driver, who was trying to evade arrest, crashed through barricades set up for a South By Southwest event and ran over several people.

Five of the injured were listed as critical. The two that died were riding a moped that was hit by the motorist.

According to police, the driver then struck a cab before crashing. He then tried to flee on foot, but he was tracked down by an officer and shocked with a stun gun before being taken into custody.

Some of the victims were hit in front of The Mohawk, where Tyler the Creator was headlining.

The driver now faces two counts of capital murder and 23 counts of aggravated assault with a vehicle.