FILE - This Feb. 24, 2013 file photo shows singer Adele performing 

FILE - This Feb. 24, 2013 file photo shows singer Adele performing "Skyfall" during the Oscars at the Dolby Theatre in Los Angeles. There are hundreds of copycat versions of Adele's Oscar-winning song on the Spotify subscription service, confusing customers who think they are buying Adele's version. Adele's label, XL Recordings, is keeping her music off of streaming services until download sales peter out. In the meantime, copycat artists fill the void, racking up royalty revenue, often before customers realize they've been listening to someone else. (Photo by Chris Pizzello/Invision/AP, file)
Associated Press
FILE - This Feb. 24, 2013 file photo shows singer Adele performing "Skyfall" during the Oscars at the Dolby Theatre in Los Angeles. There are hundreds of copycat versions of Adele's Oscar-winning song on the Spotify subscription service, confusing customers who think they are buying Adele's version. Adele's label, XL Recordings, is keeping her music off of streaming services until download sales peter out. In the meantime, copycat artists fill the void, racking up royalty revenue, often before customers realize they've been listening to someone else. (Photo by Chris Pizzello/Invision/AP, file)
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