And the Keeping Up With The Kardashians star has EVERY right to be proud - she looks amazing!
The 36-year-old mum of three shared a new photo on Friday (30 October) with the caption: "TGIF."
In the snap, Kourtney is smiling at something off camera and sitting in just her underwear...
Wearing a pure white underwired bra and Calvin Klein hi-rise knickers, we're not surprised Kourt is looking pleased with herself.
All that hard work in the gym has clearly paid off!
Kourtney Kardashian (@kourtneykardash) October 30, 2015
Fans were quick to tell Kourtney what they thought of her gorgeous photo.
One said: "The cutest most wifey of all the kardashians imo."
Another said: "YOU LOOK SO HOT! MILF."
While one posted a supportive message, saying: "You are incredibly stunning. Keep working on your body, your kids and your happiness. Have a nice day Kourt!"
Unsurprisingly, the photo has been retweeted 14,000 times and favourited by 35,000 of her 16.5million followers.
This is my I feel sick and have no time to rest face. pic.twitter.com/DanLzEyeHw— Kourtney Kardashian (@kourtneykardash) October 28, 2015
Just a few days before, Kourtney told her followers that she was feeling unwell, saying: "This is my I feel sick and have no time to rest face."
She certainly doesn't look sick to us!
Kourtney is currently estranged from Scott Disick, the father of her three children.
They split in July after nine years together, with his excessive partying reportedly being the final nail in the coffin.
He is currently receiving treatment for his issues with addiction.
It emerged in October that Scott had quietly checked into a rehab centre shortly before his former brother-in-law Lamar Odom was found unresponsive at a Nevada brothel following an alleged drug overdose.
All you need to know about Kourtney Kardashian:
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