In February 1991, Carr began feeling ill. Medical tests initially revealed what appeared to be manageable health issues. However, further tests determined that he had heart cancer. In April 1991, Carr underwent a series of surgeries to remove tumors in his right atrium and lungs in an effort to restore heart function and prevent the cancer's growth. Soon after Carr's diagnosis, Paul Stanley and Gene Simmons replaced him with session drummer Eric Singer to commence new recordings for the band's upcoming album "Revenge". After recovering from the multiple surgeries, Carr pressed Stanley and Simmons to let him back in the band. Stanley and Simmons refused; both have stated they repeatedly told Carr to focus on his cancer treatments and they would allow him to return to Kiss once he regained his health. By mid-1991, the band was preparing to shoot the music video for their upcoming single "God Gave Rock and Roll to You". Despite his poor health, Carr asked Stanley and Simmons to allow him to be in the video. They ultimately agreed.