"Hearts On Fire" is a high-energy 1986 rock song by John Cafferty featured in Rocky IV that peaked at number 76 on the Billboard Hot 100. It is famously used during the film's climactic training montage, highlighting the contrast between Rocky’s grit and his opponent's high-tech training. The track, written by Vince DiCola, Ed Fruge, and Joe Esposito, is a quintessential 80s power ballad with lyrics focused on overcoming impossible odds. The song appeared on the successful Rocky IV soundtrack, which earned a platinum certification. You can listen to "Hearts On Fire" on Spotify or find the lyrics on Musixmatch .