The 34-year-old Keeping Up With the Kardashians star has been sharing photos from the recent high-fashion photo shoot all day long. "Here are some behind the scenes of our Balmain ad campaign shoot in NYC! This is me & @olivier_rousteing discussing some looks before the hair & make up began," the fashionista wrote this morning. In the accompanying pics, Kim models some seriously sexy dresses. One of the cleavage-baring ensembles even showcases some major side boob. VIDEO: Kris Jenner copies Kim's style Instagram One particularly revealing cutout dress even had Kanye West smiling from ear to ear!