UPDATED Video: Blake Shelton and Miranda Lambert to perform "Over You" in honor of Oklahoma on "The Voice" tonight; Swon Brothers contending on tonight's show - Article Photos 441/520

A couple walk down a residential road between downed trees aftera tornado struck near 156th street and Franklin Road on Sunday, May 19, 2013 in Norman, Okla. Photo by Steve Sisney, The Oklahoman