In 2000, Tim Westergren started Pandora, a pioneering Internet radio company that now has 22 million intensely loyal users. The site recommends songs to people based on their favorite artists, tracks, and albums. Along the way, the Oakland, California entrepreneur has reinvented his business model again and again. He has also clashed with the recording industry and was nearly forced to close his doors several times last year. "I've never, ever given up, even when we were in the most depressive bleak times," Westergren told Inc. in 2007. "I always thought Pandora was a good idea and would have a day." Here's how he built a web behemoth.
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