Carrie Underwood is known for being a Country music diva. She has topped the charts on numerous occasions beginning with her debut album "Some Hearts" in 2005. But it was a Christian hymn that Underwood sang with Vince Gill this past week that gave goose bumps to the audience as well as the viewers who were watching in on CBS. Her teary performance of "How Great Thou Art" has been viewed more than a million times on Youtube in just a week. "Wow! God was in the house," "I am not a Christian but this is truly beautiful," "She is an angel" to "This is the most moving version of that song I have ever heard," "I'm speechless," were some of the reactions. Check it out: