Recent reports claim that Kendall Jenner is starring in a Calvin Klein underwear ad campaign in collaboration with Justin Bieber, after the speculation that the pair was both in New York City for a photo shoot.

The "Keeping Up with the Kardashians" reality star took to her Instagram account in March to post a snapshot of herself sporting a white Calvin Klein bra along with matching underwear underneath her baggy jeans. "Morning! Just going to hang out in #MyCalvins alllll day! ... thank you @calvinklein for my little gifts," she wrote the following caption.

Ten days later, Jenner's close pal Justin Bieber also showcased the famous brand's undergarments on social media. In two Instagram photos, the "Bad Day" crooner posed in a pair of black Calvin Klein briefs and wrote on one of the images before deleting the caption an hour later: "What if I do a Calvin Klein campaign?? Comment below yes or now."

However, a spokesperson for Calvin Klein said, "As a policy, we don't comment on rumors."

Meanwhile, Selena Gomez allegedly unfollowed Kendall Jenner and her sister Kylie after they spent some time with Justin Bieber. Not only that, the "Come & Get It" singer also criticized Kim Kardashian's half-sisters for partying too hard.

However, a source says otherwise: "Selena has it twisted -- not only do Kendall and Kylie eschew drugs and alcohol ... they believe Selena's the real drama-obsessed party girl. After all, she's the one who's been to rehab."

Another source added that the Jenner sisters "feel like they're better off without her."