Question: Who sang the best day of my life?
Answer: American Authors
Disambiguated annotations:
qaPairs: question: Who sang the 2013 version of Best Day of My Life?
answer: American Authors
question: Who sang the March 29th, 2014 version of Best Day of My Life?
answer: Tyler Ward and Cimorelli
question: Who sang the easy listening version of Best Day of My Life?
answer: Vitamin String Quartet