'The Sing-Off' is back on | BackStage

Name: 'The Sing-Off' is back on | BackStage
Uploaded: 2013-12-09T17:35:49Z
Duration: 1 min 10 s
Description: Carly Mallenbaum hosts BackStage covering acapella competition show 'The Sing-Off.' The NBC show returns with a new judge, and, hopefully, a new winner to rival reigning champions (and YouTube stars) Pentatonix.

Carly Mallenbaum hosts BackStage covering acapella competition show 'The Sing-Off.' The NBC show returns with a new judge, and, hopefully, a new winner to rival reigning champions (and YouTube stars) Pentatonix.