Video: Blake Shelton is proud to be an Oklahoman.

Blake Shelton has assembled a choir of 20 Oklahoma singers for NBC's new reality competition, "Clash of the Choirs" . Other choirs in the show will be lead by Michael Bolton, Patti LaBelle, Kelly Rowland and Nick Lachey. If Oklahoma's choir wins, the winnings of $250,000 will be donated to a military family fund and Project Rebuild . NBC's four-night reality show debuts tonight at 7pm CST.