Sometimes it takes a while to cross a song from one format to another. We have two examples of that among this week's HitPredictors. "Mountain Sound" by Of Monsters and Men has been on the Alternative chart for 42 weeks, and just this week it becomes a HitPredictor at Top 40. Also, "Lover of the Light" by Mumford & Sons was a HitPredictor at Alternative on January 14th. Five months later, it's a HitPredictor this week at Hot AC.