OKLAHOMA CITY, May 27 (UPI) -- Luke Bryan, Rascal Flatts and Ryan Tedder of One Republic have joined the "Healing in the Heartland: Relief Benefit Concert" in Oklahoma City, NBC said.
Wednesday's show is being organized and will be headlined by country music star Blake Shelton. The concert is to raise funds for the United Way of Central Oklahoma May Tornadoes Relief Fund.
Tickets for the concert went on sale Saturday morning and sold out in under 5 minutes, said NBC, which is airing the concert. The program will also air on cable networks Style, G4, Bravo, E! and CMT on either a live or delayed basis.