"Hollow Moon (Bad Wolf)" is a song by American electronic rock band Awolnation. It was released as the lead single from their second studio album Run (2015). The song became their first number-one hit on the Billboard Alternative Songs chart in early 2015. Bruno has stated in various interviews that he wishes the song Windows would have been the first single, but the choice of the first single was a collaborative effort between the record company and himself and he found it easiest to just work to a middle ground.