This one-of-a-kind art doll is called "Shall We Dance." It depicts Jack Skellington and Sally from The Nightmare Before Christmas. Jack's cute little dead ghost dog Zero is also part of this art sculpture piece.
I often look at, out of curiosity, repainted and redressed Blythe dolls. How delighted I was to see this Sally NMBC one-of-a-kind Blythe doll! The doll artist is Rainfable Dolls on eBay. Gorgeous doll - the dress she's wearing should be way more authentic looking though, and true to the original. Not sure why she's wearing something brown and weird.