This one is part of the Tingeling Halloween Couture too, it's the Blood Red Skirt. Originally it was green, but "blood red" is probably a better color. Originally, it costed 22$. Now it can rarely be found, but the prices are diverse (mine was 11$, but I've seen them sell for 60$ too.) If you know how, it can be used in many ways. Here it is:
Real life, it's Rodarte. The collection is from fall 09. As I've said, it's green, unlike the Stardoll version, and it's a bit longer too.