OKLAHOMA CITY (AP) – Usher and Darius Rucker have been added to the lineup of performers for tonight’s benefit concert for victims of the Oklahoma tornadoes. Other musicians who will play “Healing in the Heartland: Relief Benefit Concert” include organizer Blake Shelton, Miranda Lambert, Reba, Luke Bryan, Rascal Flatts, Ryan Tedder of OneRepublic and Vince Gill. The concert will be shown live on NBC. The event will raise funds for the United Way of Central Oklahoma May Tornadoes Relief Fund.