“My twin. Happy 5th Birthday,” Kim wrote. “I really can’t believe you’re 5! I’m so so proud to be your mom, it’s the best feeling in the entire world.

Kylie and her kids, Stormi and Aire, attended the extravagant bash. Kylie Jenner decided to give fans an inside look at the big birthday bash for her sister Khloe Kardashian's daughter, True ...