By Brandy McDonnellSinger and ventriloquist Darci Lynne Farmer, 14, of Oklahoma City, made a triumphant return to "America's Got Talent: The Champions" tonight, performing a seemingly impossible vocal feat on the finals of the "AGT" spin-off series.As previously reported, the Oklahoma native was granted a wildcard berth last week after she was not selected as one of the competitors on the Jan.Read more on NewsOK.com