Kourtney Kardashian Shows Off Rock-Hard Abs in Teeny Black Bikini -- See the Pic!

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DAYUM, Kourtney Kardashian!

The 37-year-old reality star has been hitting the gym extra hard as of late, and all of those intense workouts have clearly paid off. The eldest Kardashian sister took to social media on Wednesday to show off her incredible results -- just in time for summer! -- with a bikini-clad selfie.

WATCH: Khloe and Kourtney Kardashian Celebrate 'Cheat Day' with Popeyes on a Private Jet!

Rocking a teeny-tiny two-piece, sunglasses and red baseball cap, the mom of three appeared as confident as ever as she pursed her lips and threw up a peace sign for the revealing photo.

"Sun vibes," she captioned the pic on Twitter, accompanied with a sun emoji and link to the Kardashian Sun Kissed tanning line.

Kardashian posted the same photo to Instagram, this time opting for the peace sign and kiss emojis in her caption. She quickly followed it up with a similar photo, which was "blurry," but apparently still Instagram-worthy.

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In case you haven't been keeping up with Kardashian's gym routine, she loves posting her exercises via Snapchat. Hours before her brother-in-law, Kanye West, debuted the official music video for "Famous" during a live event at The Forum in Inglewood, California, Kardashian was working out to the catchy tune.

Beyoncé jams
are just as effective, especially when jumping rope.

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She proves that squats are always better with friends!

Leg lifts? No problem.

Get it, girl!

WATCH: Kourtney Kardashian Stuns in Plunging Red Dress

Earlier this month, Kardashian also flaunted her slimmed-down figure in a daring red Julien Macdonald dress at Glamour's Women of the Year Awards in London.

To hear more on that risqué red carpet look, watch the video below.

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