"The Sing-Off" is a one-of-a-kind battle of voices that features the country's top a cappella groups performing popular songs in a way that viewers never heard them before. There's no lip-synching, back-up bands or safety net. They'll be singing for America's vote with the winner walking away with the ultimate prize -- an Epic Records/Sony Music recording contract.
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | December 2011 | 2 | |
| Season 1 | December 2009 | December 2009 | 4 |
| Season 2 | December 2010 | December 2010 | 5 |
| Season 3 | September 2011 | December 2011 | 12 |
| Season 4 | December 2013 | December 2013 | 7 |
| Season 5 | December 2014 | 1 | |
| Unassigned Episodes | 0 |
| Season | From | To | Episodes |
|---|---|---|---|
| Specials | 0 | ||
| Unassigned Episodes | 31 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 31 |
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