Project Runway

Former "Project Runway" finalist Mychael Knight died Tuesday morning in a Georgia hospital ... TMZ has learned.

Knight died after recently checking into the hospital. We're told he'd been getting treatment for intestinal issues when he passed at around 7:30 AM. While it's still unclear what caused his death, a few months ago Mychael revealed he'd been battling IBS -- irritable bowl syndrome -- and made it clear it was wreaking havoc on his immune system.

Knight was famous in the fashion world after his successful run on season 3 of 'Runway' ... going on to launch his own lines of clothing and lingerie. He also once designed for Starbucks, and even created his own fragrance brand, MajK.

Knight placed fourth during his season on 'Runway,' and won the Fan Favorite Award as well.

He was only 39.

Michael Costello, fashion designer to the stars, is slimming down to comply with what he calls the industry standard -- "skinny bitch" -- and he's using lasers to do it.

Michael finished 4th on Season 8 of "Project Runway" and told us about the moment at a friend's wedding when he knew it was time to fight the fat. One button can change a lot.

He went to Dr. Rollins at Elite Body Sculpture in Bev Hills on Friday to get Airsculpt Laser Liposculpture on his stomach and waist. The procedure uses lasers to soften up your fat, then they vacuum it out. Michael says he dropped 2 sizes instantly.

Michael recorded the good doc going to work on him. Check it out ... if you can stomach it.

'Project Runway's" Tim Gunn could not mask his contempt for the Kardashians, nor did he even try to hide it, calling them "vulgar."

Gunn appeared on HuffPost Live and went off on the girls and on Kanye, saying disparaging things about West's clothing line.

Floyd Mayweather Jr.'s baby mama is LIVID -- telling TMZ, her 10-year-old daughter was dressed up like some gold-digging hoochie at the big fight on Saturday ... and it's all one designer's fault.

The designer in question is Project Runway's Michael Costello -- and Floyd's baby mama Josie Harris tells us, Costello was hired to design a very special dress for the boxer's 10-year-old daughter Jirah to wear at the Canelo fight in Vegas (left).

Josie says the dress came out great -- but when they showed up to the fight, she noticed Floyd's on-and-off-again side piece Shantel Jackson wearing the same exact dress (right).

According to Josie, she paid Costello $795 for a one-of-a-kind dress, and now she's pissed the guy gave a replica to none other than Floyd's girlfriend ... who also sat ringside.

Josie tells us, "It's an unspoken rule and a cardinal sin for a 'real designer' to dress clients alike going to the same major event ... Tacky, tacky, tacky."

And Josie didn't stop there, turning her anger toward Jackson as well ... adding, "She is a total gold digger ... She conveniently came back around 2 days before Floyd got his $41.5 million check."

As for the designer, Costello says he will NOT be giving anyone a refund -- telling us, "No exclusivity was promised regarding the dress. If you want exclusivity, you need to pay more." Costello says his people told Miss Jackson that Floyd's daughter would be wearing the same dress and she didn't care.

Kashou claims in the suit -- filed Friday in L.A. County Superior Court -- he was minding his business at the popular West Hollywood restaurant/bar The Abbey, when a table of fans recognized him. Kashou says one of the men at the table, Arturo Trejo-Perez, scoffed, "Who the f**k are you?" Kashou says he said humbly, "I'm nobody, I'm just the waiter," and then walked away.

But it didn't end there. Kashou says a few minutes later, he was at the bar when Perez came up to him, beer bottle in hand, and asked, "Did you even f**king win?" ... then poured beer over Kashou's head while screaming, "You are nothing but a lowlife has-been reality show loser." Then, according to Kashou, Trejo-Perez smashed him in the face with the bottle.

According to the suit, Trejo-Perez was eventually arrested, but only after repeatedly punching Kashou.

One of the most memorable -- and hated -- finalists from "Project Runway" is behind bars right now for allegedly fashioning a weapon out of a living, breathing, meowing cat ... and firing it at her ex-fiance!

Kenley Collins -- the trash-talking, third place loser from P.R. Season 5 -- was arrested in a Brooklyn home early yesterday morning, after the D.A. claims she attacked her sleeping ex-fiance with anything she could get her hands on -- including a cat, a laptop, several apples and finally ... water. It's like a design challenge turned violent!

It's unclear what started the fight, but according to legal papers Kenley told her ex, "You're lucky ... it could've been a lot worse."

Kenley was arrested and charged with six crimes -- including 2nd degree assault, 3rd degree assault and criminal possession of a weapon in the 4th degree.

Rami Kashou, the runner-up on this season's "Project Runway," was involved in an altercation at a West Hollywood bar last night. Kashou was allegedly struck in the face with a beer bottle.