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 consistency, answers should be in all lower cased letters.

Category: BETTER KNOWN AS.... 
Clue: Singer Helen Folasade Adu
sade

Category: GUINNESS RECORDS 
Clue: With an average of 80.5 years, this Asian country leads the world in life expectancy
japan

Category: HOOKED ON HOMOPHONICS 
Clue: Negating adverb, or a half-hitch

not / knot