from ABC News/Entertainment on abcnews.go.com
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, had their video added by CMT, and now have at their fingertips limitless possibilities that good old-fashioned word of mouth brings in the Internet age.
"Instantly, with one click, five million people knew our names," White said of Swift's tweet.
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