Article continues below advertisementGene Simmons and Paul Stanley are mourning the heartbreaking loss of their KISS bandmate Ace Frehley.On Thursday, October 16, the legendary guitarist passed away at 74, and shortly after, his former bandmates expressed their grief in a joint statement.Article continues below advertisement"We are devastated by the passing of Ace Frehley. He was an essential and irreplaceable rock soldier during some of the most formative foundational chapters of the band and its history," they shared via a publication. "He is and will always be a part of KISS's legacy.