Two New Jersey songwriters have filed a copyright-infringement suit against mega-producer Rodney Jerkins, singer Mary J. Blige, rapper Jay-Z, Universal Music Group and a dozen other defendants in U.S. District Court in South Jersey. The songwriters, Jermaine Jumpp, of Willingboro, and Michael C. Adams, of Union Township, claim that they sent Jerkins a CD with several tracks they wrote in 2001 and that in 2005 Jerkins produced a song "Enough Cryin'" by Blige that they claim sounds a lot like their song "On My Grind." The pair is seeking to halt the sale or distribution of the song until they are properly credited as songwriters, as well as an accounting of any royalties they may be owed from sales. The complaint gives no indication why the pair waited so long to sue. We called the law firm representing the songwriters to ask for a copy of their track so we could decide if the song and "Enough Cryin'" were similar, but their attorney did not return several calls. Reps for Jerkins and Universal did not return our requests for comment.