Drake, who had the top torrent downloaded in the U.S. in the first half of 2012, according to Musicmetric, poses at the MTV Video Music Awards in September.
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In much of America, the availability of online video is often frustrated by slow broadband speeds. In this 2011 photo, Valerie Houde waits for a dial-up Internet connection in East Burke, Vt.
Donna Summer in 1976. YouTube's Chris Maxcy says the company targets advertising to videos by artists like her and gives a share of the revenue from it to the track's label and publisher.