American Idol's Clay Aiken brings his grandmother to share a family recipe for Hot Pineapple Salad. Later, Clay performs live. Plus, Martha shows you how to make an easy and festive decoration for your Halloween party. And, our weeklong series on Going Green wraps up with important ecofriendly tips from Laurie David, producer of Al Gore's An Inconvenient Truth. Laurie and Martha also answers audience questions about the environment. And, today's your last day to enter Martha's Ultimate KB Home Giveaway—watch for the final clue.