After Andy returns from Milan, she brings souvenirs to Lily's apartment. One of the gifts is a Valentino purse. Aside from being an obvious callback to the original film when Andy gives her the new Marc Jacobs bag, this is also a special nod to Valentino Garavani himself. If you didn't know, Valentino was the only major luxury fashion designer who agreed to have a cameo in the first film. He was also supposed to appear in the sequel, but his health severely declined, so that wasn't possible.