LoliRock Season 1 Episode 17 Heavy Metal Episode Title:Heavy Metal.Episode Description:At a music showcase concert, Iris encourages her schoolmate Zack Brady to perform with his parents watching, but when he goes on stage, his guitar mysteriously flies off. Other performers' instruments also fly away. The girls suspect it is the work of the twins but when they confront them, the twins' band monster is able to cancel out all their attacks. Iris must decide whether to defeat the monster at the cost of destroying the instruments.