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: WORLD GEOGRAPHY 
Clue: This European grand duchy has 2 distinct land regions: the Ardennes & the Bon Pays
luxembourg

Category: AMERICAN ART & ARTISTS 
Clue: Roy Lichtenstein perfected his technique for simulating benday dots to mimic the artwork found in these "strips"
comic strips

Category: ACTRESSES & THEIR ROLES 
Clue: In 1997 Brandy starred on TV as "Cinderella" & this singer played her fairy godmother

whitney houston