Demi Moore can thank Sienna Miller for stealing her “Spanx or Pants? You Decide” award. The other night, in frigid New York, Sienna hit an after-party for Factory Girl in a pair of black granny panties and tights. Bravo to the cute actress for bringing mucho attention to herself. But couldn’t she at least credit her style icon: Rue McClanahan? Then, there’s Demi in her black-tie bicycle shorts in 1989. She got a lot of heat for that Oscar get up, which she designed on her own. My prediction for the future of knickergate? Paris Hilton will wear a thong and matching veil to her first wedding.