Wixen Music Publishing filed a $1.6 billion copyright lawsuit in a California federal court against popular music streamer Spotify. Wixen claims that the Stockholm-based service used thousands of songs — including those by the Doors, Tom Petty and Neil Young — without a direct or compulsory license and without compensating the music publisher. According to Reuters: “Wixen also alleged that Spotify outsourced its work to a third party, licensing and royalty services provider the Harry Fox Agency, which was ‘ill-equipped to obtain all the necessary mechanical licenses.’” Spotify, which has grown in value to $19 billion, recently filed IPO documents with the SEC.