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!

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 & @JustinBieber family pool day!!!" she captioned on Instagram. "#Bestbabysitterintheworld ❤"

Bieber himself didn't seem to hate his afternoon with Kourtney Kardashian's oldest son either. Wearing a baseball cap and his signature shades, the "Baby" singer wrote, "Mason is cool as a fan." For those who haven't been keeping up, the Kardashian family and Bieber have a long history and friendship together.  For a time, Kourtney was neighbors with the pop star before Khloé Kardashian decided to purchase his Calabasas house. There's also a special bond Kendall Jenner and Kylie Jenner share with the singer.

Whether posing in photo shoots together or hanging out together at mutual friends' parties, the threesome have remained friendly for many years. And yes, there has even been some possible romance rumors between Bieber and Kendall in particular.

"He's a longtime friend of our family," the Keeping Up With the Kardashians star said in a recent interview. "Everybody loves to assume things, but no….I'm truly focusing on my career."