She said she dressed that way because she's a huge fan of the show.
Blackface was used in American popular entertainment for roughly a century, starting in the mid-1850s. Both white and black performers put it on and acted in accordance with established caricatures of blacks for laughs.
Its legacy can creates a quandary for both races. Manthia Diawara, chair of the Africana Studies Department at New York University, studied the complex issue in her 1998 report, The Blackface Stereotype.
"In the blackface myth, there is a white fantasy which posits whiteness as the norm," Diawara wrote. "What is absent in the blackface stereotype is as important as what is present: every black face is a statement of social imperfection, inferiority and mimicry that is placed in isolation with an absent whiteness as its ideal opposite."