Fashion Week officially kicks off today, but the celebrations began last night — and Dutch designers Viktor & Rolf hosted an explosively good party. The duo held a bash in New York to celebrate their first scent, Flowerbomb, which turns five this year. Models Erin Wasson and Shalom Harlow were among the guests, all of whom were treated to a intimate backyard performance by Alison Goldfrapp. As for the heady floral scent, it's been a best-seller since its launch. "We live in Amsterdam and we bike a lot. When you pass someone, it's very noticeable," Viktor Horsting said. "I'm always very happily surprised because it's so recognizable." Still turning heads after five years.