Sarah Jessica Parker and Jane Seymour had a charitable night at the The Pierre Hotel in New York City, where the two actresses attended the Alzheimer’s Association's annual Forget Me Not Gala: An Evening To End Alzheimer's. "Thanks to all who made last night's gala a huge success!" the non-profit tweeted. Parker paired her L’Wren Scott dress with a YSL jacket, Fred Leighton jewels, and Manolo Blahnik shoes, while Seymour chose an ivory halter gown with silver beaded waist and neckline by Pamella Roland. Click through the gallery to see more stars at last night's biggest events.