Season 4, Episode 1 The Sing-off Is Back!
First Aired: December 9, 2013
The groups try to impress the judges and win over the crowd with the best songs from their music libraries in the Season 4 premiere.
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- Premiered: December 14, 2009
- Rating: TV-PG
- Premise: Eight a cappella groups from around the country compete for a recording contract and $100,000. (more)
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