Spotify has been hit with a huge copyright lawsuit that alleges the music streaming company "failed to pay songwriter royalties to a publishing company approximately 21 per cent of the time," according to the complaint. Wixen Music Publishing filed the $US1.6 billion lawsuit against Spotify on December 29. The music licensing company says it represents Tom Petty, Rage Against the Machine, Missy Elliott, Neil Young, Weezer, and the Beach Boys, among other artists.