John Corabi is a heavy metal singer and guitarist who has worked with such bands as Angora, The Scream, Mötley Crüe, Union and ESP (both with former KISS lead guitarist Bruce Kulick), Ratt (as a guitarist), Twenty 4 Seven (with his then Ratt bandmate Bobby Blotzer), Zen Lunatic, Brides of Destruction, and Angel City Outlaws (with his then Ratt bandmates Robbie Crane and Bobby Blotzer, and former Ratt guitarist Keri Kelli, who he replaced in Ratt).