Who Needs Guitars When You Have Voices Like Pentatonix? - Seattle Weekly (blog)

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Who Needs Guitars When You Have Voices Like Pentatonix? Seattle Weekly (blog) What Glee did for show choir, Pentatonix did for a cappella music. The L.A.-by-way-of-Texas quintet won the third season of The Sing-Off, a now-defunct American Idol-like competition show, in 2011 and have since brought their brand of a cappella music ...

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