Accounting for a small fraction of American music sales, Christian music exists at the margins of the music business. For example, most religious albums are sold not at record stores but through religious bookstores. Many artists find tension between the view of their work as a religious ministry and the economic need to make profitable, popular music. Like the secular country music industry the Christian music industry is based in Nashville, Tennessee, and is most popular in the Southern Bible belt states. Well-known Christian music artists include Amy Grant, the group DC Talk and Michael W. Smith.