PHOTO: Kendall Jenner Posts Underwear Selfie on Instagram

Kendall Jenner decided to post a photo of herself in her underwear on Instagram … but she isn’t the only one who’s done it and she has a reason …

Apparently, we will be seeing a lot of celebrities in their underwear because Calvin Klein has started a campaign. Too Fab reports:

The clothing brand recently launched a social media movement that encourages people to post semi-nude selfies in their CK underwear, to be added to the official #mycalvins online gallery. It sounds like they sent the 18-year-old model some free goodies so she’d participate.

Other than Kendall, Fergie posted a sexy video in her Calvins just a couple weeks ago and you can view it below: