Pippa Middleton’s wardrobe worked overtime yesterday! The royal-in-law kept busy in London promoting her new party-planning book Celebrate: A Year of Festivities for Families and Friends (pre-order it for $50 on amazon.com), hopping from book store to book party. She made four official appearances in all, wearing a different look each time, and her superfans on pippa-middleton.co.uk were quick to identify each look. From left, she wore a Markus Lupfer jersey and brocade dress, a Roksanda Ilincic wool-crepe style, a Stella McCartney mixed-fabric sheath, and a Paper London patchwork tunic. So, which one was your favorite? Tell us by voting in the poll below!