Derek Sherinian is an American keyboardist of Armenian descent who has toured and recorded for Alice Cooper, Billy Idol, and Joe Bonamassa, among others. He was also a member of Dream Theater from 1994 to 1999, is the founder of Planet X and also one of the founding members of Black Country Communion, Sons of Apollo, and Whom Gods Destroy. He has released nine solo albums that have featured a variety of prominent guest musicians, including guitarists Slash, Yngwie Malmsteen, Allan Holdsworth, Steve Lukather, Joe Bonamassa, Michael Schenker, Steve Vai and Al Di Meola, and extensively drummer Simon Phillips.

William Michael Albert Broad, known professionally as Billy Idol, is an English-American singer, songwriter, musician and actor. He first achieved fame in the 1970s emerging from the London punk rock scene as the lead singer of the group Generation X. Subsequently, he embarked on a solo career which led to international recognition and made Idol a lead artist during the MTV-driven "Second British Invasion" in the US. The name "Billy Idol" was inspired by a schoolteacher's description of him as "idle".