By Althea Serad (media@latinospost.com) | First Posted: Dec 14, 2015 05:51 AM EST

Justin Bieber and Kourtney Kardashian are hooking up, and it appears the 21-year-old "Sorry" singer is proud of it, and that he's telling everyone he knows.

It looks like ex-boyfriend Scott Disick may have no chance with Kourtney now, for the meantime at least.

The "Keeping Up With The Kardashians" star was spotted last week at the Montage at 4:00 a.m., which started the rumor mill going about their hookup.

The Justin Bieber, Kourtney Kardashian hookup was also confirmed via a US Weekly source, who revealed that the mother-of-three went to Justin's American Music Awards after-party at The Nice Guy in LA on November 22.

Justin is apparently very vocal about his new arrangement.

"Justin bragged to friends recently that he has been hooking up with Kourtney Kardashian," the Us Weekly source said.  

"Oh yeah, that's definitely happening and has been for some time now," another source said. "Every time Kourtney and Justin are together, they're extremely flirtatious. They text each other all the time."

Hollywood Life also reported exclusive details that on Friday, December 11, Justin and Kourtney went on a date at The Nice Guy for a second time and continued their fun night at the Blind Dragon karaoke bar.

"Justin performed two songs," the Hollywood Life source said. "He and Kourtney were nearly inseparable. They were smoking on the patio together and super touchy-feely."

At the same night, Kourtney was reportedly spotted at the Montage Beverly Hills, which is Justin's popular hangout. While there's a chance that Scott Disick's ex-girlfriend could have been there to rest, she was spotted checking out at 4:00 a.m. At the time, the website assumed that Kourtney could have visited the Canadian pop star since he was Kendall and Kylie Jenner's friend, but now rumors point to something else.

Furthermore, according to Celebuzz, Justin Bieber and Kourtney Kardashian's relationship has been going on for quite some time now. With each rumor, new info is also revealed.

Meanwhile, before anyone speculates that the 36-year-old mother-of-three is getting serious with the 21-year-old R&B singer, a source from Gossip Cop did say that everything is "just fun".

As for Scott Disick's chances with Kourtney, while the reality star spent a lot of time with her ex in recent weeks, she is reported to be closing doors when it comes to a reconciliation.

Justin Bieber, on the other hand, as noted by Hollywood Life, appears to be using the hookup with Kourtney as a distraction from recent news that Selena Gomez has moved on with One Direction's Niall Horan.

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