Internet buzz helps The Civil Wars find success

NASHVILLE, Tenn. -- Here's a question the members of the duo The Civil Wars have been contemplating a lot lately: What's the value of a star's tweet? Or two? Or three? For Joy Williams and John Paul White, tweets by Taylor Swift, Hillary Scott of Lady Antebellum and Sara Bareilles, among many others, helped drive first-week sales of their debut album, "Barton Hollow," to levels they didn't expect. They sold out one tour and now have a more ambitious schedule down the road. "Instantly, with one click, five million people knew our names," White said of Swift's tweet.