Hilary Duff at a World AIDS Day "Elixir" book signing

Stepping out for a book signing, Hilary Duff was spotted at a Borders in Glendale, CA on Wednesday December 1. The blonde beauty looked absolutely gorgeous as she signed copies of her new literary offering, “Elixir,” for some lucky fans during the World AIDS Day fundraising effort.Taking to her Twitter to keep her followers updated, Duff wrote, “Signing #ELIXIR at Borders in Glendale, CA in