SAN DIEGO (AP) _ The Recording Industry Association of America has filed a copyright infringement lawsuit against for its services that allow users to instantly hear music and add their personal music to a play list.

The lawsuit, filed Friday in New York, claims that the San Diego-based's use of the music is unauthorized because the company does not own the music and is offering the music without permission.

``This is a blatant infringement of rights, upsetting not only to record labels, but also large numbers of artists, retailers and technology companies who have business agreements with copyright owners,'' Cary Sherman, senior executive vice president and general counsel of the RIAA, said in a statement. confirmed it was served with the lawsuit but the company's chief executive officer, Michael Robertson, said he did not have a chance to review it.

``We have every intention of fighting this to the court of last resort, if necessary,'' Robertson said in a statement.

The lawsuit claims that's Instant Listening Service and Beam-it violate copyright laws. Instant Listening Service allows customers to listen to a CD after they have purchased it while Beam-it is a program allowing users to add their own CDs to their personal playlist online.

Hilary Rosen, president and CEO of RIAA, wrote a letter to the head of, dated Friday, saying the association had attempted to negotiate with but to no avail.

``We regard's business choices to be in reckless disregard of the law with serious consequences to the company and its shareholders,'' Rosen wrote.

``The copyright law was not invented just to protect the interests of companies, it exists to protect the creative talent of the many artists this culture has fostered and the investment in their work,'' the letter said.