Froggy Duds. The wig is a 5/6 Yuri wig by Monique Gold.
She's wearing a dress, necklace and headpiece by Tonner Doll Company designed for Antoinette, called Sinuous. It's a perfect fit. (Lan can wear most outfits made for the Tyler Wentworth body, but she is an even better fit for Antoinette's outfits.) Shoes are also by Tonner, for their 22" American Model dolls.
See more photos of Sinuous Lan in my Flickr photostream.