"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! "He's happy about this look!" Kim captured the cute snapshot. Meanwhile, Kim wasn't shy about struggling to squeeze her signature curves into one especially tight look.