Kourtney Kardashian steps out in see-through black top

Kourtney Kardashian turned heads on Monday night when she stepped out for dinner in a racy black top and bra.

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Looking like the epitome of cool, the oldest of the Kardashian girls was spotted leaving the Los Angeles hot-spot The Nice Guy wearing a sheer black leotard over an equally as sheer black bra, showing off her incredible slimmed-down body. She accompanied the all-black look with loose-fitting pants, a choker and a classic blazer draped over her shoulders.

She was joined by model younger sister Kendall Jenner, who went for the more casual look of a cropped gray sweatshirt and black pants with snakeskin heels.

This is the second date night with a younger sister in as many nights for Kardashian, who attended a handful of Golden Globes after parties with 18-year-old Kylie Jenner on Sunday night. The pair stunned in coordinated silver sparkling looks and seemed to be having a ball.

Kardashian famously lost weight following her split in the middle of last year from longtime boyfriend Scott Disick, who she shares three children with. She was most recently romantically linked to the much-younger star Justin Bieber -- though there was allegedly nothing ever too serious going on between the two.

See photos of Kourtney Kardashian with Scott Disick from over the years:

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