Justin Bieber and Kendall Jenner Serve Super Sexy Slayage in Calvin Klein Ads [PHOTOS!]

Two of the world's hottest stars are joining forces to promote the latest in underwear fashion. Heartthrob Justin Bieber and super model Kendall Jenner both served serious slayage in the recent launch of Calvin Klein Spring 2016 collection. The stars both shared what they do in their Calvin's on Instagram. See the super sexy photos below!

Justin Bieber and Kendall Jenner had no problem stripping down to their undies for the latest Calvin Klein social media campaign. The master minds at Calvin Klein recruited several celebrities, including Fetty Wap, Kendrick Lamar, and FKA Twigs to flaunt their Calvin Kleins and fill in the blank of "I ____ in #mycalvins."

For the second year in a row, Bieber partnered with Calvin Klein to model his goods. This year, he took it to a whole new level and put his body forward across Twitter and Instagram.

 Back in bed with @justinbieber. Introducing the Spring 2016 Calvin Klein global advertising campaign. Photographed by Tyrone Lebon. #mycalvins Stay tuned for more.

A photo posted by Calvin Klein (@calvinklein) on Jan 26, 2016 at 4:05pm PST

If you think this show of him grabbing his "goods" is steaming hot, Bieber topped off the global advertising campaign with a second pose in black Calvin briefs, saying that "I flaunt in #mycalvins."

I flaunt in #mycalvins. Introducing the @CalvinKlein spring 2016 campaign A photo posted by Justin Bieber (@justinbieber) on Jan 26, 2016 at 3:21pm PST

Kendall Jenner kept things nice and steamy in her all white tank top and brief set, laid out on white sheets looking like the woman of your dreams. She posed on the official Calvin Klein Instagram page with the caption, "I dream in #mycalvins."

 I wake up in #mycalvins. @kendalljenner for the Spring 2016 Calvin Klein global advertising campaign. Photographed by Tyrone Lebon. See more at calvinklein.com.

A photo posted by Calvin Klein (@calvinklein) on Jan 31, 2016 at 2:55pm PST

Fans even got a glimpse at all her best assets with a video montage of her slaying in another Calvin Klein set telling fans "I want to be with you in #mycalvins. My new Spring 2016 @calvinklein campaign...what do you do in yours?"

 I want to be with you in #mycalvins. My new Spring 2016 @calvinklein campaign... What do you do in yours?

A video posted by Kendall Jenner (@kendalljenner) on Jan 26, 2016 at 3:00pm PST

To find out more about what some of your favorite celebrities do in their Calvin's check out the Calvin Klein Twitter or Instagram pages. Comment and tell us your thoughts of the sizzling new campaign featuring Justin Bieber and Kendall Jenner!