Khloe Kardashian has hailed Kim Kardashian West as "super woman" in a birthday tribute to her sister

Khloe wrote: "Happy birthday sweet Kimberly!!! My entire life, you've always been someone that I look up to. To me, You are super woman!! I'm not sure how you do it all and make everything look so easy. People have no idea how selfless of a human being you are. With no credit wanted either. (sic)"

Khloe also thanked her sister for helping her to survive the last 12 months of her own life, which has included the arrival of her six-month-old daughter True and rumours of her splitting from NBA star Tristan Thompson.

Khloe said she's become even closer to Kim - who has kids North, five, Saint, two, and nine-month-old Chicago with Kanye West - because of the recent dramas they've both been through.

Khloe's post continued: "I am so impressed by the woman, wife and mother you have become.

"I'm so thankful for us getting closer over the last year. You're a f***ing rider! Without you I would be lost! Crazy s**t happens to us all of the time, but how f***ing lucky are we that we get to experience this crazy thing called life with one another? I know for certain, that no matter what happens to any of us, we will always be OK because we have one another.

"I hope you have the happiest of birthdays Keeks! I pray that every wish you have, it comes true. You are so deserving! I love you!! Until the end of time, I love you!!! (sic)"