Spotify celebrates its 20th anniversary with a first-ever list of its 20 most streamed artists, albums, songs, podcasts, and audiobooks (Gil Kaufman/Billboard)

Gil Kaufman / Billboard : Spotify celebrates its 20th anniversary with a first-ever list of its 20 most streamed artists, albums, songs, podcasts, and audiobooks —  But who else made the cut? … It was 20 years ago today that Spotify began to play.  And to mark the streaming service's big anniversary …

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