Talk about promotion!

Kendall Jenner is part of the Kardashian clan, so naturally she knows how to get some exposure! The model posted the above "belfie" of herself in Calvin Klein underwear and no top, and is it just us, or is her booty getting bigger? If she wants to continue to be big in the fashion world, she better not be going to Kimmy K's doctor for booty injections!

The brunette beauty has a lot on her plate these days! She's busy designing her PacSun line with sister Kylie, she's the face of Calvin Klein and Estee Lauder, and she might be romancing the Biebs, who coincidentally or not so coincidentally modeled for the Calvin.

Kenny's showing off the goods!