The producers of the Grammy Awards are suing the music-sharing Web site Napster over potential lost revenue from the planned release of Stan, the duet performed by Eminem and Elton John at this years Grammy Awards, according to SonicNet.com. National Academy of Recording Arts and Sciences president Michael Greene says the single, which was going to be a charity fund-raiser, may not be released now. You have to ask yourself if people are going to buy it after its been downloaded hundreds of thousands of times on Napster, said Greene. It catches you by surprise when you find so many people with so little regard for copyright, and it has a chilling effect on the copyright owner when they realize people can get their music for free. Representatives for Napster had no comment on the NARAS suit.