TASK DEFINITION: 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.
PROBLEM: Category: SPORTS & MUSIC 
Clue: In July 2010 this Rock & Roll Hall of Famer performed at the Baseball H.O.F. induction ceremonies

SOLUTION: john fogerty

PROBLEM: Category: NEXT LETTER AFTER... 
Clue: ...J in the Macedonian alphabet

SOLUTION: k

PROBLEM: Category: ACTORS & ACTRESSES 
Clue: Jinkies!  It wasn't too much of a stretch for him to play Fred in the "Scooby-Doo" movies

SOLUTION:
freddie prinze, jr.