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: ACTORS
Clue: In 1970 he became the first professional actor to be named a lord

SOLUTION: laurence olivier

PROBLEM: Category: MUSICAL THEATRE
Clue: Currently, this show is performed by 3 troupes; the Liffey & Lagan Companies on tour & the Shannon Company on B'way

SOLUTION: "riverdance"

PROBLEM: Category: HIT SONGS
Clue: Inspired by a Meher Baba saying, this 1980s Grammy winner was the first a cappella recording to top the Billboard 100

SOLUTION:
"don't worry, be happy"