Pop star Justin Bieber is baring almost everything for underwear brand Calvin Klein.
On his official Instagram account, the singer - and model - posted photos of himself posing with model Lara Stone for the new Calvin Klein Jeans and Calvin Klein Underwear campaigns.
The photos, which show his distinctive sleeve tattoos, have received about a million likes each since they were posted earlier this week.
The 20-year-old is also seen drumming in a promotional video put up by Calvin Klein. The clip, which features Stone too, ends with the slogan "my Calvins".
Calvin Klein has enlisted many famous faces for its ad campaigns over the years, including actors, athletes and football players.
Jamie Dornan and Eva Mendes
Northern Irish actor Dornan is no stranger to Calvin Klein, having appeared in separate sizzling ad campaigns with supermodel Kate Moss in 2006, and with actress Eva Mendes in 2009. The former model is playing the titular Christian Grey in the movie adaptation of 50 Shades Of Grey.
The actor is best known for his role as Emmett Cullen, or the adoptive brother of Edward Cullen, in The Twilight Saga movies. He modelled for Calvin Klein in 2010.
Djimon Hounsou, well-regarded for his performance in 2006 film Blood Diamond, was featured in Calvin Klein Underwear's campaign in 2007. It was the first time the brand, launched in 1982, used an African model in its ad.
Former Swedish footballer Fredrik Ljungberg is smouldering in shots taken for a 2006 campaign but he later admitted that he regretted modelling men's underwear for the brand because of the unwanted attention he received in real life.