Here’s Rex Viper’s third song… “Hearts on Fire”!!! It’s one of the most badass montage songs from Rocky IV. Originally performed by rock singer John Cafferty and written by Vince DiCola (also on keyboards), Ed Fruge, and Joe Esposito, true legends of the 80’s action montage soundtrack. This song has been called a “high-adrenaline rock’n’roll over pummeling percussion.” Awesome! This video is a nerdy workout, intended to get you mentally pumped up.