With 2014 marking InStyle’s 20th anniversary, we’ve been planning big things to celebrate the major milestone—including a cool new capsule site dedicated to all things “20,” like our gallery of covers through the years, the 20 reasons why 1994 was the most stylish year ever, the 20 hunkiest men of style, and super-stylish giveaways. This month, we’re rolling out the Ultimate Fall Fashion Sweepstakes that will award one lucky winner a trip for two to New York City to attend the coveted InStyle 20th Anniversary Party (featuring a live performance from a top musical artist) and an Anne Klein shopping spree with an InStyle Style Ambassador at Macy’s Herald Square.

The contest is now open! For full rules and to enter our sweepstakes, visit facebook.com. Good luck!