Justin Bieber and Lara Stone share a steamy clinch in a new Calvin Klein ad.

The unlikely couple star in the brand’s latest campaign.

In one ad for Calvin Klein jeans, supermodel Lara, 31, who is married to comedian David Walliams, sits astride the topless, 20-year-old pop star, who is lying on the floor.

Another begins with Justin – again topless – showing off his drumming skills, while Lara is seen wearing nothing underneath her open shirt.

The pair then embrace, placing their hands all over each other, and Justin leans in for a kiss.

Other black and white shots include the tattooed Boyfriend singer flashing his Calvin Klein white underwear, and mother-of-one Lara, who is a regular Calvin Klein model, wrapping her arms around the star as she appears topless.

Justin showed off snaps of himself as the new face of the brand on Twitter.

And he paid tribute to a former Calvin Klein model Mark Wahlberg:

The new campaign is not the first time that Justin has donned Calvin Klein underwear while sharing the limelight with the model.

In September they shared a stage in New York to present Fashion Rocks – but in those snaps Lara towered over the pop star.

Justin Bieber and Lara Stone presenting Fashion Rocks in New York
Justin Bieber and Lara Stone present Fashion Rocks (Heather Wines/CBS /Landov
Image)