Nicole Richie worked alongside supermodel Karlie Kloss and local NYC teens to help restore a mosaic that pays tribute to 9/11 at the Bing Do Something event. And even though community service was on the agenda, Nicole still managed to put together a laid-back but stylish outfit. We caught up with the mom and designer, who revealed a few of her Summer essentials, and the items she always has in her purse. Watch today's Fab Flash to find out more. On Allison McNamara: Flirt Catalog dress, House of Harlow 1960 ring.