Fashion Street Style Kim Kardashian Kicks Off Caitlyn Jenner's Birthday Celebrations in a Skin-Tight Look By Kelsey Glein Kelsey Glein Twitter Kelsey Glein is a Seattle-based writer and editor who covers all things fashion, beauty, and pop culture. She was previously the Digital Editor of InStyle and is currently a Social Media Manager at a cosmetics company. InStyle's editorial guidelines Updated on October 28, 2015 @ 01:15PM Pin Share Tweet Email Photo: AKM-GSI You have to hand it to Kim Kardashian—she knows what style works best for her and she sticks to it. Yesterday, the star joined her sisters Kylie Jenner and Kourtney Kardashian to jump-start Caitlyn Jenner's birthday festivities, and she donned another body-hugging look for the occasion. For their group lunch at L.A. area restaurant Villa, Mrs. West wore a head-to-toe nude ensemble that included a tight midi-skirt that really showed off her baby bump, a semi-sheer tank, and matching duster jacket. She topped off her look with a metallic choker and ankle-strap sandals. Kardashian also shared a photo today of herself and the birthday girl from their get together, which she captioned: "Happy Birthday Caitlyn! Are you 66 or is Caitlyn 1? lol That was the debate at our bday lunch yesterday! Have the best day ever filled with lots of love & laughs! You have shown me what it's truly like to live an authentic life without caring what the world would think! I love you!" PHOTOS: Kim Kardashian's Most Memorable Maternity Style Moments