With explosive growth in streaming, social media, artist apps and more, mobile finally took over the music industry.

Like smart watches and cars that drive themselves, the celestial jukebox is no longer science fiction. Thanks to the supercomputers that 71 percent of Americans now keep in their pockets, whether tablets or phones, everyone's a mobile-music power user. Streaming has brought fans access to any song, any time, anywhere. As users listen, they can receive a steady stream of free content -- photos, tweets, videos -- from their favorite stars in real time. They can view tour dates, purchase tickets, buy merch, interact with fellow fans.

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