Country music is a genre of popular music that originated in the southern United States, particularly in areas such as Tennessee, Kentucky and West Virginia. It has roots in traditional folk songs, Celtic music, blues and gospel music. Country music often features themes such as love, heartbreak, family, friendship, work and patriotism. The genre is characterized by its use of stringed instruments like the guitar, fiddle, banjo and steel guitar, along with a strong vocal style that emphasizes storytelling and emotion. Some popular country music artists include Hank Williams Sr., Johnny Cash, Patsy Cline, Dolly Parton, Willie Nelson, Garth Brooks and Taylor Swift among many others.