Justin Bieber & Kourtney Kardashian Dating? Rumored Couple Together Again!

Are Justin Bieber and Kourtney Kardashian at it again? Last night, after the 58th Annual GRAMMY Awards presentation in Los Angeles, the 21-year-old singer hosted a post-awards show bash at West Hollywood’s The Nice Guy, and in attendance was Kourtney Kardashian.

Wearing a black lace jumpsuit, the mother of three was spotted arriving to the bash with her sister, Khloe. Meanwhile, Justin Bieber’s on-again, off-again girlfriend, Hailey Baldwin, remained on the east coast, where she is currently attending a number of fashion shows during New York Fashion Week.

On February 16, People Magazine reported news of Kourtney’s attendance at Justin Bieber’s party, claiming the venue where the event was held was a favorite of the rumored couple. In fact, just two months ago, Justin Bieber and Kourtney were said to be touchy-feely at the nightclub.

In December, a source revealed to Us Weekly that Justin Bieber and Kourtney began dating just weeks after she split from Scott Disick, the father of her three children, Mason, 6, Penelope, 3, and Reign, 1.

“[Justin Bieber] and Kourtney have been hooking up since late August, early September,” the source explained, claiming Bieber was bragging about his hookup with the older woman. “Justin started hanging out with Kourtney alone because she started going out more.”

Meanwhile, added the source, Kourtney’s ex believed she was only parading her rendezvous with Justin Bieber around town to make him jealous (In addition to their nightclub outings, Kourtney was also photographed leaving Justin Bieber’s hotel room in the wee hours of the morning).

“Scott feels she’s doing this to get back at him and get revenge,” the insider says. “He feels he has to take it and can’t say anything after all he did to her, but he thinks it’s dumb and immature.”

“[Justin Bieber] bragged to friends recently that he has been hooking up with Kourtney Kardashian,” a second insider told Us Weekly after Kourtney was seen at Justin Bieber’s American Music Awards after party in November.

“Oh, yeah, that’s definitely happening and has been for some time now,” added a separate source. “Every time Kourtney and [Justin Bieber] are together they’re extremely flirtatious. They text each other all the time.”

During Justin Bieber’s November event, a source at The Nice Guy claimed the rumored pair were “flirty” as they sat together touching and laughing, and one month prior, they were at the venue yet again, and later visited Universal Studios for their “Halloween Horror Nights” attraction.

“When he was there with Kourtney, [Justin Bieber] was such a gentleman and so nice and respectful,” a source told the magazine. “He was definitely trying to impress Kourtney and act more mature.”

Following months of rumors regarding Justin Bieber’s relationship with Kourtney, he traveled to Anguilla for the holidays with Baldwin, and his relationship with Kourtney appeared all but over as he and Baldwin posed for pictures and shared a New Year’s Eve kiss. Then, after Justin Bieber returned to Los Angeles, his relationship with Baldwin seemed to quickly fade away, and in late January, he and Kourtney visited The Nice Guy on the same night, hinting they may have rekindled their alleged romance.

Since Justin Bieber and Kourtney were seen at The Nice Guy last month, he once again reunited with Baldwin for a number of Super Bowl festivities, but now, after last night’s joint outing, it’s hard to say who has his interest.

[Photo by Jason Merritt/Getty Images for NARAS]