Reba and Blake Shelton are giving back to their home state. Their tornado relief concerts raised 500 thousand dollars for Oklahoma. They played two sold-out shows last week, singing duets and providing harmony on each other's hits. Their only solo numbers came during the encore, with Shelton going it alone for "Ol' Red" and Reba taking the spotlight for "Fancy." Kelly Clarkson even stopped by for a special appearance on Thursday.