Last week, Darius Rucker paused work on his third country album to throw a party in Nashville for the Charleston, SC 1966 No.  1 single "This," co-written with Frank Rogers and former American Idol judge Kara DioGuardi.  "'This' was the first song I ever wrote on iChat," says Rucker.  "Kara was in Los Angeles and Frank and I were in Nashville.  I just thought it was the perfect song to really bridge the gap from Learn To Live to this album."