Kris Jenner calls Bieber the 'best babysitter in the world'

Kris Jenner has called Justin Bieber the "best babysitter in the world" after the "Baby" singer hit the pool with Kourtney Kardashian's eldest son Mason Disick.
"#Mason & @JustinBieber family pool day!!! "#Bestbabysitterintheworld," she captioned on Instagram.
Wearing a baseball cap and his signature shades, the 21-year-old singer wrote, "Mason is cool as a fan."
Bieber and the Kardashian family have a long history of friendship and there had been romance rumours too between Bieber and Kendall Jenner, though the model had denied them, saying he was just a long time friend of their family.