Kim Kardashian admits she sometimes 'cries herself to sleep' in candid chat about parenting struggles

Kim Kardashian's stylish daughter North West gives her pal a hug

Kourtney Kardashian ditches her blonde hair and goes back to brunette declaring: 'brunette4lyfe'

Kim Kardashian showcases her sculpted arms while promoting the SKIMS summer pop-up in New York City