Carrie Underwood Hair

Carrie Underwood — “Play On” (Sony): World, meet Carrie Underwood, the pop star. While the music of Nashville has long been country music in name only, pop tunes disguised with a mask of fiddles and the occasional banjo or mandolin, former American Idol Underwood truly embraces pop with “Play On,” the same way Faith Hill did a decade ago with “Breathe.”