Kourtney Kardashian and Justin Bieber have been ‘hooking up’ since AUGUST!

According to reports in the US, Kourtney Kardashian and Justin Bieber have been hooking up since August. In Hollywood terms, five months is a full-blown relationship but friends of the pair have been quick to shut down speculation that this is anything more than a ‘brief flirtation’.

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“It's been a deep flirtation for months,” an insider told Us Weekly. “[Justin’s] obviously close to the family, and Kris is obsessed with him [but] it's just one of those things where it makes Kourtney feel good about herself. It's not serious at all.

“This young guy is into her, he thinks she's hot and she's older. She just wants to have fun.”

And what fun they’ve been having. The pair have been pictured out partying together loads recently and earlier this week, Kourtney was photographed leaving Justin’s hotel in LA at 4am. The cheeky minx.