Facebook has broken it’s ties with Project Playlist, just days after rival MySpace cut its links with the fast-growing music-sharing startup over copyright violation fears! Just days after MySpace made a similar move, Facebook on Tuesday said it was removing a Project Playlist application from the facebook.com

This move came a day after the California-based Project Playist announced its biggest plan yet: An agreement with Sony BMG to make its library of digital music available to users of playlist.

Project Playlist, which allows users to upload music and create and share play lists, is being sued by the RIAA and three other major music labels for copyright violations.

In a statement obtained by several technology blogs, Facebook said the RIAA “initially contacted Facebook last summer requesting the removal of the Project Playlist application for copyright violation, and recently reopened those communications.

“We have forwarded RIAA’s letters to Project Playlist so it can work directly with that organization and music labels on a resolution,” Facebook said. “In the meantime, the application must be removed to comply with the Facebook Platform Terms of Service” facebook added.

Project Playlist now has a userbase of more than 40 million according to comScore research.