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Sounds Like: Rockapella, Pentatonix, The House Jacks, Straight No Chaser, Tonic Sol-fa
Label: A Cappella Records
Bio: KeyStone is a part-time professional six-voice contemporary a cappella group based in Philadelphia, Pennsylvania. Founded in 2011, KeyStone strives to present innovative, original arrangements of pop and rock music both familiar and obscure. The six members of KeyStone have over 100 collective ye...See Full Bio