VIDEO : Kourtney Kardashian Wears Lingerie To Jessica Alba & Cash Warren's Pajama Party

Kourtney Kardashian gave a sexier look while attending Jessica Alba and Cash Warren's pajama party to celebrate his 38th birthday at the couple's Los Angeles home on Saturday night. While mostly everyone was in a printed onesie; Kourtney wore a sexy sheer, black, and embroidered lingerie top which she paired with an open silk black pajama shirt and pants. The reality star posted to Instagram and shared some photos from the party captioning one photo "Pajama jammy jam."