VIDEO : Kourtney Kardashian Flashes a Smile During Night Out in NYC

Kourtney Kardashian was all smiles when she and her sister Kim Kardashian were spotted in NYC on Tuesday night. Both stars showed some skin in all-black outfits, and they were joined by pal Jonathan Cheban. It's been a busy week for the Kardashian-Jenner family, as the five sisters just launched their apps. On Monday, Kim's baby bump was on display when she was out and about with Kylie Jenner, and on Tuesday, Khloé Kardashian thanked fans for their support of the apps, which quickly gained momentum on the App Store.