Born Micael Kiriakos Delaoglou on October 31, 1963, in Gothenburg, Sweden, Mikkey Dee built one of metal's most respected resumes behind the kit. He first made his name with King Diamond, joining in 1985 and powering the horror theatrics of Fatal Portrait, Abigail, and Them before leaving over songwriting friction, though he briefly returned as a session player on Conspiracy. In 1992 he stepped behind the drums for Motörhead, replacing Phil "Philthy Animal" Taylor and making his live debut with the band that August in New York. Dee anchored the lineup for over two decades, appearing on records like Bastards and Sacrifice and becoming the band's longest serving drummer. When Lemmy died in December 2015, Dee announced that Motörhead itself was finished, calling it the only right way to close the book.

Born on October 31, 1967, in New York City, Adam Schlesinger became one of power pop's sharpest craftsmen as a founding member of Fountains of Wayne, co-producing the band's catalog from its 1996 self titled debut through Welcome Interstate Managers, home to the wry suburban hit "Stacy's Mom," which earned the band a Grammy nomination for Best New Artist. Schlesinger's gift for pitch perfect pastiche extended well beyond his own band: he wrote and co-produced the title song for the film That Thing You Do!, earning Oscar and Golden Globe nominations, and later picked up three Emmy Awards for comedic songwriting on Crazy Ex-Girlfriend. He also co-wrote the stage musical Cry-Baby. Schlesinger died of complications from COVID-19 in April 2020, a loss keenly felt across the power pop and musical theater worlds alike.

Born on October 31, 1981, in Belleville, New Jersey, Frank Iero joined My Chemical Romance in 2002 as rhythm guitarist and backing vocalist, becoming part of the engine behind the band's theatrical, confessional brand of emo. He appears on all of the band's major releases, from Three Cheers for Sweet Revenge and its breakout single "Helena" through the sprawling concept record The Black Parade and the dystopian Danger Days: The True Lives of the Fabulous Killjoys. Beyond My Chemical Romance, Iero kept busy through the band's 2013 breakup with side projects like Leathermouth and Death Spells before launching a solo career, releasing albums under names including Frank Iero and the Patience and Frank Iero and the Future Violents. My Chemical Romance reunited in 2019, with Iero back in his familiar spot on guitar.