However, this isn't the first time we have seen the sisters posing in a pair of C.K briefs, remember Khloe Kardashian's highly anticipated pregnancy announcement?
Many fans thought that Khloe would announce the baby news on an episode of Keeping Up With The Kardashians as it has the most potential to bring in views and dollars for the KarJenners. However a brand deal could specifically bring in a ton of money for Khloe and go relatively unnoticed if done well.
WWD first reported that Calvin Klein was going to feature the entire clan back in December, revealing "that’s hundreds of millions of social media followers in one fell swoop." Khloe's pregnancy announcement alone garnered over eight million likes on Instagram!
The 33-year-old made some serious coin too, according to reports she earnt approximately $USD 200,000. Woah!
This article originally appeared on InStyle Australia.