So I wanted to listen to the Cars Soundtrack and noticed the best song on the album is missing. Route 66 by John Mayer. I can't figure out why this one song is missing. John Mayer is on Spotify as are several other versions of Route 66 (Chuck Berry, The Rolling Stones and Depeche Mode are the notable ones). Does anyone know why John Mayer's version isnt' available?
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Spotify likely does not have permission from the artist for that song to be available.
Spotify tries really hard to get music available on their service, but in the end the availability of music on Spotify is up to the artist and their music label.
This thread by Spotify staff explains why some music is not available: