Clash of the Choirs is a live four-night reality choral competition from NBC. There are five competing choirs from 5 different cities and they are being conducted by superstars like Nick Lachey, Patty Labelle, Michael Bolton, Kelly Rowland and Blake Shelton -- to embark on a musical challenge to compete live in studio for the title of America's best choir. Watch the videos after the jump...

Clash of the Choirs TV Spot:

So far, Team Labelle is leading but there’s something special about Team Lachey.

Team Lachey – Unwritten:

Team Labelle – He’s Got The Whole World In His Hands: