Shirtless Justin Bieber Has a Cute Pool Day With the Kardashian-Jenners

Justin Bieber had some adorable company while splashing around on Friday: Kourtney Kardashian and Scott Disick's eldest son, Mason Disick. On Saturday, Justin shared a cute moment from the group's fun day on Instagram. "Mason is cool as a fan," Justin captioned the snap, which shows the little guy getting a piggyback ride from the singer. Mason's grandmother Kris Jenner regrammed the picture, writing, "family pool day!!!"

The picture-perfect afternoon follows up Justin and Kendall Jenner's hot Vogue spread, in which the stars show plenty of skin. Justin has never been shy about taking his shirt off, even when he's not scoring some sun. (Remember that time he stripped down to his underwear on stage?) The pop star kept things professional at his Comedy Central roast earlier this month, though. In between all the potentially awkward jokes about his ex Selena Gomez, Justin made time to hang out with Kendall at the event. You'll be able to see all the stars at the roast when the special airs on Monday.

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A pal fed Justin grapes while he lounged poolside. "The kids gotta eat too," he wrote.