Korn's Jonathan Davis will not be joining the Rob Zombie and Marilyn Manson-led 'Twins of Evil' tour after all, as exhaustion has taken its toll on the singer.

The vocalist has kept a busy schedule in 2012, not only supporting Korn's 'The Path of Totality' album on tour, but also exploring his budding electronic music career under the stage name 'JDevil.'

The rocker has been doing remixes for other artists like his 'Twins of Evil' tourmate Rob Zombie and taking the opportunity to do DJ sets here and there. But apparently the full schedule of 2012 has caught up with him as he informed fans of his decision to back out of the tour via a Facebook posting. It read:

Hey Guys- we wanted to let you know right away that JDevil will no longer be able to join Rob Zombie and Marilyn Manson on their co-headlining Twins Of Evil Tour this October. Due to exhaustion from his recent eight week overseas tour with KORN, Jonathan's doctors have ordered him to refrain from any travel and performing for the next few weeks while he recuperates. We got this from management: "Jonathan is really bummed right now and regrets having to disappoint anyone, especially his fans and his good friends Marilyn Manson and Rob." We'll keep you updated here, everyone expects he'll be back on track soon.

The singer also tweeted to fans, "I'm sorry guys. My head and my body are really f---ed up. Back on meds trying to get better. Dr. said no way I could perform. F---! I'm sorry. I really love you guys. I'm so depressed."

Davis announced his participation in the 'Twins of Evil' Tour at the end of July, revealing that it would allow him to pursue his EDM side project. At the time of the announcement, the vocalist stated, "I like to think of JDevil as the ‘anti-christ’ of EDM. To play along side Zombie and Manson is going to be a f—ing sinister night all around, and an unbelievable experience. I can’t wait.”

Even without Davis, the pairing of Rob Zombie and Marilyn Manson is a formidable bill. The 'Twins of Evil' tour launches Sept. 28 in Phoenix.