When Keith Urban asked Carrie Underwood to be a part of his song “The Fighter,” she was already involved in her “Storyteller Tour” and had little free time. She told Urban that she had a day off in St. Louis that would be her last free day before he had to finish  his Ripcord album. While Keith was filming his latest video that day, he flew the song’s co-writer Busbee to St. Louis, got a studio and was in there with Carrie.