Article Photos: Backstage interviews and more: Music superstars unite for Toby Keith-organized Oklahoma Twister Relief Concert 5/6

 Toby Keith performs during the Oklahoma Twister Relief Concert, benefiting victims of the May tornadoes, at Gaylord Family - Oklahoma Memorial Stadium on the campus of the University of Oklahoma in Norman, Okla., Saturday, July 6, 2013. Photo by Nate Billings, The Oklahoman