Kourtney Kardashian Strips Down to Her 'Birthday Suit' to Celebrate Turning 38

Kourtney Kardashian celebrated her 38th birthday on Tuesday by sharing a nude photo.

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Kourtney is clearly extremely proud of her toned figure and, after three children - 7-year-old Mason, 4-year-old Penelope and 2-year-old Reign - she certainly should be.

The reality star's impressive rear was impossible to miss in a nipple-baring snap, which she shared with her 56 million followers. Kourtney posted a photo of herself in her birthday suit to Instagram, and, not surprisingly at all, it's insanely hot. I can't believe I'm blessed enough to not only have you in my life but to call you my sister and best friend!

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The 61-year-old captioned the snap: "Happy birthday lovely @kourtneykardash!"

"Birthday suit", Kourtney simply captioned it, while being inundated with compliments from fans.

Kourtney Kardashian isn't one to shy away from flaunting her body.

The group was spotted throughout the day at the happiest place on earth as they were photographed enjoying iconic the Big Thunder Mountain Railroad ride.

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"Happy birthday to the Milly to my Vanilli @kourtneykardash", Khloe posted on Instagram. "You bring happiness love and light and are such an inspiration to me, and everyone around you", the 61-year-old momager wrote.

Kim, 36, and Khloe, 32, shared similar sentiments about Kourtney online. You inspire me everyday and you show me that women really can do it all! "You are such an incredible mother, sister, friend, and daughter and I love you more than words can ever say".

When they're not posting birthday wishes, the Kardashian sisters often use their social media accounts to share pics and videos of their group workouts.

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  • Theresa Obrien