Hilary Duff had her almost 8-month-old son, Luca, on her hip as she headed into a grocery store in LA yesterday. Luca was bundled up in a hat while Hilary wore a scarf and floral Level 99 jeans to protect against the chilly West Coast weather. Luca just celebrated his first Halloween. The little guy also reached another milestone — crawling! Hilary recently talked to Parenting magazine about motherhood, sharing that she stays focused on working out because she's "so grateful to be able to escape for an hour a day and clear my head. I feel like it makes me a better mom."