What an end to another innovative and exciting season of Project Runway. This week, it was down to the final three designers -- Jillian, Rami, and Christian.   First, all three had to do a model casting for the show at Bryant Park. While Rami and Christian were happy with their choices, Jillian was nervous about hers and asked if she could replace one model. She was told by the agency that there was no time, and while she focused on the negative for a bit, she finally snapped out of it. After critiques from Tim and final preparations, the three finalists headed to Bryant Park for a once-in-a-lifetime experience. There they were met by a full tent of spectators, including guest judge Victoria Beckham.   In the end, while all the designers showed spectacular work, it was 21-year-old Christian Siriano who took home the title and the prizes.