You certainly can’t hang "slacker" around Nicole Richie’s neck. Not only is the mother of two the creative director of her Winter Kate fashion line and House of Harlow 1960 jewelry collection, but she’s also the co-founder (along with hubby Joel Madden) of the Richie Madden Children’s Foundation, which supports local kids and schools right here in L.A. The multi-tasking momma is bringing fashion and philanthropy together today when her custom Winter Kate dress—which she designed for model Britt Maren to wear at the Met Ball last Monday—goes up for auction right now on eBay. The bidding will start at $500, and all proceeds will go to benefit the kids of the Richie Madden Children’s Foundation. So, get your fingers ready to click, and shop, for a really great cause.