In another posting she notes a general problem with tribal fashions:
Which is definitely a piece of the issue. A major problem with depictions of "Native" in reference to American Indians is the reduction of 500+ tribes, each with their unique history, culture, language, and traditions into one stereotyped image, one that we as Native people know well: the buckskin-clad, feather-headdress-wearing, face-painted, Plains-inspired Indian. They also only ever seem to appropriate three tribes in terms of names and "inspiration"—Navajo (or Navaho if you’re Urban Outfitters), Sioux (which is another antiquated name and represents a group of tribes, not just one), and Cherokee (believe me, I KNOW about that one). You never seem to see a Nisqually V-neck or a Wampanoag jewelry holder.
More fashion analyses from Native Appropriations:
"Tribal Fashion": the newest trend?
Nicole Richie's baby mocs
The Strange Case of the Hipster Headdress
Really? Amy Poehler? A headdress, really?
These fashion-related stereotypes are a subset of the more general problem of the Indian wannabe. From Halloween to the Mardi Gras, no one ever wants to be a specific kind of Indian: a Modoc, Salish, Caddo, Miami, or Tuscarora, to pick five tribes at random. Everyone wants to match the romantic image of the Plains Indian chief, warrior, or princess from countless stereotypes.
For more on the subject, see Heidi and Spencer Adopt "Indian Names," Kesha in Headdress and Warpaint and Indian Wannabes.