First think of the the increasingly popular movie about collegiate a cappella, "Pitch Perfect." Envision the illuminated stage, the enthusiastic audience and the vocals that send chills up your arm.
On Monday, NBC’s a cappella competition “The Sing-Off” returns for a fourth season on Monday, Dec. 9. Ten teams (list below) will compete for a recording contract and a $100,000 prize. “A cappella ...
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