Kris Jenner Calls Justin Bieber the "Best Babysitter in the World" After Singer Enjoys Pool Day With Mason Disick

When a babysitter isn't available, call Justin Bieber! That appears to be Kris Jenner's way of thinking as she headed to Instagram Saturday afternoon to show off a picture of the "Baby" singer and Mason Disick having fun in the pool. "#Mason ... http://ift.tt/1G5Hw6E