I know the show isn't super popular like American Idol, America's Got Talent and Dancing With The Stars, but if you like pure vocal harmonies you should be watching The Sing Off!  Last night, the groups took their try on country music.  Check out some of the videos.....They are two of my favorites.  The first is an all female group called "Delilah" and the second video is by "Pentatonix".  Enjoy!!!!