Kourtney Kardashian is starting the New Year with elevated fashion. The Keeping Up With the Kardashians star took to Instagram to share a mirror selfie of her wearing a black bustier and black pants. The reality TV and Instagram star glowed in the sheer lingerie look.

While Kourtney doesn't have her own fashion line, like Khloé Kardashian's Good American and Kim Kardashian's SKIMS, she does rock whatever she puts on. When KUWTK started, she was known for dressing more modestly than her sisters. Now, she's giving the other Kar-Jenner ladies a run for their racy fashion money.

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In the new mirror selfie, the influencer and fashionista is flaunting her beauty, as well as her ties with designer Olivier Theyskens. The Theyskens piece she wore is crafted from sheer lace, and paired with businesslike trousers that hug her figure. She posted the shot to her Kourtney Kardashian Instagram account this Monday. The post was captioned with, "🖤 @oliviertheyskens." The photo, which was reposted to the brand's Instagram story, shows the 5' 1" fashionista looking 6 feet tall in her monochromatic outfit. The high-waisted pants come together with two clasps and perfectly match the one-shouldered bustier's finishing. She completes the look with black and brown pointed-toe heels. The French and Belgian designer Oliver Theyskens is known for his sultry yet structured pieces. His gothic pieces have been featured at Paris Fashion Week since the 1990s. See Kourtney in her bustier below:

Kourtney from KUWTK has been turning heads with her recent fashion evolution. She is really refining her looks and making major statements with standout outfits. Her New Year's look featured yet another bustier neckline situation on a sexy, almost punk-inspired black leather dress. Kourt exuded real 2021 energy and styled the dress futuristically, topping it off with a high ponytail, silver rectangle sunnies, and a silver choker.

Kourtney is looking irresistible. Fans marvel at how she seems to look younger every year. With her growing focus on her lifestyle website Poosh, she has been creating a lot of content that focuses on mental and physical self-care. That means giving her mind, skin, and body a lot of love. Clearly, the results are paying off. The new and improved Poosh Shop hosts a plethora of products that promote happiness, such as masks, body butter, and herbal teas. The businesswoman and Keeping Up With the Kardashians star has been really pulling out all the stops with her newfound image. Maybe Kourtney is in the process of rebranding herself with a sexier new look.

Next: KUWTK: Kourtney Kardashian's Best Pictures On Instagram

Source: Kourtney Kardashian/Instagram