Kim Kardashian West Shares Secret Snaps From Kourtney Kardashian's Birthday Vacay

It's no surprise Kim Kardashian West had an amazing time celebrating Kourtney Kardashian's birthday last week—just one look at either of the sister's Instagram pages would show just that.

The Keeping Up with the Kardashians stars didn't give all of the details behind their trip away on social media, though. While they both posted several snaps, Kim saved some of her festive photos for later, sharing several on her website Wednesday of herself, Kourtney, and their squad partying the days (and nights) away.

"Celebrating Kourtney's 38th birthday with a girls' trip in Mexico was the perfect getaway," Kim wrote on her blog. "There were 16 of us and things definitely got a little crazy! It was so fun getting to spend time with our closest friends."

One of the photos (at top) showed Kourtney blowing out the candles of her whale-emblazoned cake, clad in a white dress and a beaded necklace. In another, Kim strikes a pose barefoot, looking back at the camera in a metallic backless dress. Her hair is slicked back in a bun and she serves up a fierce pout.

While the birthday bash kicked off in Punta Mita, Mexico at Joe Francis's oceanfront holiday home, Casa Aramara, the ladies also jetted off to Puerto Rico. While there, they made the most of the gorgeous backdrop at their vacay digs, posing for a "Calabasas Mum Crew" photo, and obligatory bum-baring-by-the-pool snaps as well.

It's safe to say Kourtney's birthday girls' trip was one unforgettable experience.