InstagramNothing comes between Kendall Jenner and her Calvins, clearly.
The E! reality star showed off her killer figure in her latest Instagram selfie, dressed in a pair of Calvin Klein undies and a matching bra.
The model's washboard abs were on full display in the sexy snapshot, which was taken just moments before she joined Justin Bieber at a fashion event in Hong Kong.
The singer, who is also the face of the fashion house, gave partygoers a surprise performance during the swanky soirée and sang several of his classics like "Boyfriend" and "Beauty and a Beat."
Scooter Braun, the pop star's longtime manager, took to Twitter to give details on the party, saying, "Yeah @justinbieber is killin it at the #calvinkleinlive event in Hong Kong. Out of no where he took a request and is playing #onetime!"
Jenner and Bieber have been friends since way before the two become associated with the mega-successful brand, and the two appeared to have a blast during the party.
In fact, Jenner even posted a photo of the two of them doing cartwheels on the red—ahem, gray—carpet at the beginning of the gathering.
Back in late March, Calvin Klein announced that Jenner was joining as the new face for the brand's underwear campaign.
"Modeling for Calvin Klein Jeans is really a dream come true," Kendall said in a statement at the time about the exciting new partnership. "I've grown up wearing the brand and seeing the iconic advertising in magazines and on billboards featuring some of the world's top supermodels. To now be a part of that legacy is truly an honor."