Well hello there, Heidi Klum! After weeks of teases and plenty of sneak peeks on Instagram Saturday afternoon, the Project Runway host was finally ready to reveal her highly anticipated costume for Halloween 2015. Let's just say Roger Rabbit would be quite excited! While walking the red carpet at her annual holiday party held inside Lavo in New York City, Klum transformed into Jessica Rabbit with purple gloves, a red wig and a dress that showed off some pretty massive (and temporary) boobs and butt! So how did she nail the look? It certainly was no quick, easy task! Back at the beginning of the month, Klum began prepping for her costume with the team at Prosthetic Renaissance. Just one week ago, the 42-year-old supermodel had a team attaching a prosthetic butt and giant boobs to her body. In another picture, a prosthetic mask was being molded to her face to ensure she would be comfortable throughout her party. "This is my 16th year hosting Halloween and I've had 17 costumes, like Lady Godiva, the ‘Visible Woman' to a 95-year-old version of myself," the America's Got Talent host shared with People. "I like to switch it up every year and surprise people." And that she did! Jennifer Lopez, Nicole Scherzinger, Christian Siriano and Gigi Hadid were just some of the stars in attendance for Saturday's party.