If there are two things that Hollywood’s biggest stars love, it’s stylish shoes and worthy causes. And the Stuart Weitzman-sponsored celebrity-designed shoe auction is combining the two — and letting everyone from Hilary Duff to Jessica Alba get creative and give back. Twenty-nine of your favorite fashionistas have customized and autographed the sole of a Stuart Weitzman pump, which are up for auction online only between now and September 30th, with 100% of proceeds going directly to support ovarian cancer research. And while we’re feeling partial to Jessica Simpson‘s bedazzled creation above, click over to stuartweitzmancelebrityauction.com to check out looks by Sarah Michelle Gellar, Rachel Bilson, Blake Lively and more to judge for yourself. Then place your bid and get in on giving back.