Keeping Up With the KardashiansA poster for the fourth season of 'Keeping Up With the Kardashians' shows the three sisters clad in lingerie -- even the very pregnant Kourtney Kardashian, who is due to give birth anyday.

"I'm loving the promo poster for season 4 of 'Keeping Up with the Kardashians'!! So sexy and glam! I can't wait for the new season to start... I know you guys are going to love it!" Kim wrote on her Web site.

The E! reality series focuses on the sisters and their lives with their family. Click inside for a bigger look.