NBC is capitalizing on its hit The Sing-Off and expanding the show's season finale by 30 minutes.
The network will stretch The Sing-Off's live finale until 10:30/9:30c Monday. The 2½-hour broadcast will be followed by a preview of the comedy Perfect Couples (which Variety originally reported).
A repeat of Chuck originally was scheduled to air at 10/9c Monday.
In its second season, The Sing-Off has become a surprise hit for NBC. The new season premiered to 8.6 million viewers last week and rose 18 percent for its most recent episode on Dec. 13.
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