Brad Paisley and Darius Rucker celebrated the Jimmy Kimmel's idea for "National Unfriend Day" by performing an original song this week in Rochester, New York. Playing the melody of Willie Nelson and Julio Iglesias's "To All the Girls I've Loved Before," Brad and Darius sang, "To all the friends I've un'ed before/ Who sent me quizzes about Jersey Shore/ You made my life a hell/ Your stupid LOL/ To all the friends I've un'ed before."