American Authors (formerly known as The Blue Pages) is an American rock band originally from Boston, now based in New York City, signed to Island Records. The band consists of lead vocalist and guitarist Zac Barnett, bassist Dave Rublin, and drummer Matt Sanchez. Former member includes guitarist and banjoist James Adam Shelley. They are best known for their hit singles "Believer" and "Best Day of My Life", from their debut album, Oh, What a Life, as well as their top 20 hit "Go Big or Go Home", from their second album, What We Live For.