The Sing Off - Season 4 (2013) Chachie

"The Sing Off" season four aired on NBC December 9, 2013, and aired over several nights, concluding on December 23, 2013. This season Jewel is a judge.

Musical Groups in order of elimination:
Princeton Footnotes - (Princeton, NJ)
Calle Sol - (Aguadilla, Puerto Rico)
Street Corner Renaissance - (Los Angeles, CA)
Element - (New York, NY)
VoicePlay - (Orlando, FL)
AcoUstiKats - (Lexington, KY)
The Filharmonic - (Los Angeles, CA)
Vocal Rush - (Oakland, CA)
Ten - (Dallas, TX)
Home Free - (Minneapolis, MN)

The fourth season of The Sing-Off premiered on December 9, 2013. The number of a cappella groups was decreased from sixteen back to ten, resulting in a new format. Nick Lachey stayed as host for the new season, with Ben Folds and Shawn Stockman returning as judges. New to the judges' table was Jewel, who replaces Sara Bareilles, who left after one season. The program ran for seven episodes over the course of two weeks and concluded on December 23, 2013.
Though the show's status was unclear after the third season concluded in 2012, NBC announced in March 2013 that it would bring back the program as a special like the first two seasons.
As a new addition to the season, at the end of every show, the bottom two groups decided by the judges faced off in an "Ultimate Sing-Off", with each group singing the same song, trying to eliminate its opponent. The groups took turns alternating verses, before ending the song singing together. Also unlike previous seasons, the winner was chosen by the judges instead of by the general public.
Credit-- Wikipedia