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Kourtney Kardashian, New York Fashion Week Star Sightings

Splash News

Werk, Kourtney Kardashian. Werk.

The E! star has been serving up some sexy for quite some time now, and the latest comes nothing short of her usual. Kourt flashed her black bra while wearing a flesh-colored, sheer long-sleeve top with black leather pants, black boots and a fur overcoat. The mother of three kept her raven tresses simple in a high bun, and definitely turned heads while in New York City with little sister Kylie Jenner

"Her body looked toned and in great shape," an eyewitness tells E! News. "You could tell that she has a hot body, even in her winter outfit."

The pair went out for lunch at Serafina in the Meatpacking District ahead of heading to their Yeezy family fitting for New York Fashion Week. "They were happy, chatty," the insider continues. "They were on their phones non-stop, Facetiming."

Kourtney Kardashian, Kylie Jenner, New York Fashion Week Star Sightings

Splash News

The famous sisters walked in and practically dashed upstairs to the more secluded second floor, seemingly in a hurry to get some privacy, according to the source.

Once on the second floor, Kourt and Kylie were showing each other something that was apparently very hilarious on their phones, because the insider explains that they looked as though they were going to shed tears of laughter. "They looked like BFFs more than sisters," the source tells us.

Kourtney also shared a photo of her and Kylie strolling along the streets of the Concrete Jungle on her Instagram, cleverly captioning the photo, "Kourtney and Kylie Take New York."

The highly-anticipated fashion presentation of Yeezy Season 3 will be happening tomorrow at Madison Square Garden. Kanye West has been teasing fans with sneak peeks of his collection all week on Twitter, sharing photos of some pieces, including shoes, and even hinting at what wife Kim Kardashian will be wearing for the show, which, according to 'Ye's posts, will be a star-studded event.

Kourtney and Kylie Take New York

A photo posted by Kourtney Kardashian (@kourtneykardash) on

Stay tuned for an all new Keeping Up With the Kardashians this Sunday at 9 p.m.