Home Free is an American country a cappella group of five vocalists: Austin Brown, Rob Lundquist, Adam Rupp, Tim Foust, and Adam Chance. Starting as a show group, they toured with approximately 200 shows a year across the United States. The group won the fourth season of The Sing-Off on NBC in 2013. They sang an arrangement of Hunter Hayes' "I Want Crazy" as their final competitive song, earning the group $100,000 and a recording contract with Sony.

Music performed a cappella, less commonly spelled a capella in English, is music performed by a singer or a singing group without instrumental accompaniment. The term a cappella was originally intended to differentiate between Renaissance polyphony and Baroque concertato musical styles. In the 19th century, a renewed interest in Renaissance polyphony, coupled with an ignorance of the fact that vocal parts were often doubled by instrumentalists, led to the term coming to mean unaccompanied vocal music. The term is also used, rarely, as a synonym for alla breve.