You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: SINGERS 
Clue: She belted out "And I Am Telling You I'm Not Going" in "Dreamgirls" & turned it into a No. 1 R&B hit
jennifer holliday

Category: OVERLAPS 
Clue: Reddish-brown poisonous U.S. snake that leads the RNs at a hospital
copperhead nurse

Category: LITERATURE 
Clue: Published in Spain in 1605, this classic of world literature was an instant hit

don quixote