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 315/520

Volunteer Shelby Hays helps tornado victim Amber Kelley choose shoes for her children outside the Plaza Towers neighborhood in Moore, Okla., on Wednesday, May 22, 2013.A tornado damaged the area on Monday, May 20, 2013. Photo by Bryan Terry, The Oklahoman