Rascal Flatts has been sued for songwriting infringement. The dispute is over a track from the group's Still Feels Good album, entitled "No Reins."Songwriter D.L. Byron claims his song, "Shadows of the Night," which was written for Pat Benatar, has been used by the Country Music group in "No Reins.""It's just too much, too strikingly similar," Byron told the New York Post. "They'd have to have a tremendous lapse of memory not to realize what they were doing. It's my contention there's willful infringement."Byron is suing the group, their producers and the Disney Music Group. The complaint was filed in 2008, but the story is making headlines from Rascal Flatt's recent appearance in New York City.The band and their lawyers are calling the similarities between the two songs "coincidence."