First, De Backer is a first-rate live performer at a time where concert revenues are the only reliable income for musicians.

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She also won a Grammy in 1999 for her first live album, Live at Carnegie Hall: The 50th Anniversary Concert, and continued to tour until her death.

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What's more, Rosen is returning at a time when the live-events business is drooping badly--for the first half of 2010 ticket sales for the top 100 concert tours in North America slipped nearly 12%, according to trade magazine Pollstar.

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