Watch Miranda Lambert Tears Up During ‘The House That Built Me’ on ‘Healing in the Heartland’ Benefit [VIDEO]

Blake Shelton opened the 'Healing in the Heartland' benefit concert for Oklahoma tornado victims, but it was his wife Miranda Lambert who stole the show.  She was so overcome with emotion, she choked up in the middle of 'The House That Built Me.'  The crowds sang along until she got her voice back.

Blake Shelton and his 'Voice' co-coach Usher closed the show with 'Home.'

Reba, Vince Gill, Rascal Flatts, Darius Rucker and Luke Bryan all stopped by to perform.  Fellow Oklahoman's, Toby Keith, Garth Brooks & Trisha Yearwood, Carrie Underwood urged viewers to donate.  Jimmy Fallon and Jay Leno even made a taped appearance to encourage everyone to give what they could.

America pulled together in a big way during the benefit. Phone lines were jammed during the concert and the United Way website crashed. Phone lines will stay open for 48 hrs and you can call 1-800-890-4999 to donate or text REBUILD to 52000 or visit The United Way on Facebook.

Everyone is also being encouraged to change their Facebook profile picture to support Oklahoma.