Taylor Swift has pulled all of her songs from Spotify without giving an explanation - setting up a struggle between the industry's most popular artist and the music streaming giant.
Spotify said the singer's management asked it to take her music off the service late last week - days after the release of her new album 1989.
The move means Swift's five albums and hits including Shake It Off - the most-played song on Spotify last week - are no longer available to the site's 40 million users.
The Swedish firm tried to shake off the snub with a good-humoured statement, saying: "We love Taylor Swift, and our more than 40 million users love her even more - nearly 16 million of them have played her songs in the last 30 days, and she’s on over 19 million playlists.
Swift's 1989 is the fastest-selling album of 2014
"We hope she'll change her mind and join us in building a new music economy that works for everyone.
"We believe fans should be able to listen to music wherever and whenever they want, and that artists have an absolute right to be paid for their work and protected from piracy.