Stars came out to celebrate the opening of Rag & Bone's new flagship store in LA last night. Cameron Diaz posed with pal Reese Witherspoon on her way into the event, which also brought out Emma Roberts, Mandy Moore, and Kate Mara. It was Reese's first official red carpet since giving birth to son Tennessee James Toth in September. Reese has been all about the brand lately, wearing her Harrow booties and stocking up at the new shop on Thursday afternoon. Cameron, meanwhile, has been spending time with friends and met up with Gwyneth Paltrow for dinner on Monday and a group of ladies for lunch this Tuesday. Also on hand to toast the retail spot were Rag & Bone designers David Neville and Marcus Wainwright, stylists Meritt Elliott and Emily Current, and Mad Men's Kiernan Shipka.