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 35/520

Tiep Nguyen, with Heo's, prepares food for rescue workers inside his mobile kitchen as volunteers work to aid tornado victims and rescuers on Tuesday, May 21, 2013 in Moore, Okla. Photo by Steve Sisney, The Oklahoman