Crazy Town’s Shifty Shellshock’s cause of death has been confirmed as an overdose. The ‘Butterfly’ hitmaker – whose birth name was Seth Binzer – passed away on June 24, at the age of 49, and the band’s manager, Howie Hubberman, has revealed that drugs played a role in his death. He told PEOPLE: “Seth Binzer, after struggling with addiction and Crazy Town’s rapid success with ‘Butterfly,’ never was able to reach out on a more successful level to deal with his addictions. We all tried, but ultimately we all failed, or Shifty would still be here. “The cause of death was a combination of prescript…