Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Voices only?

This is the album to play for anyone who thinks that acappella music is solely about doowop and barbershop quartets. If they're expecting "Under The Boardwalk", give them "Come Together". If they know it's all about "Lion Sleeps Tonight", bring out "Hush". And if that doesn't work, play "Closer" and watch their jaws drop to the floor.