Shifty Shellshock, the frontman of rap rock band Crazy Town who sang the hit song “Butterfly,” has died. He was 49.

According to the Los Angeles County Medical Examiner’s website, Shellshock — whose birth name was Seth Binzer — died at his residence on Monday. A cause has not yet been disclosed.

Shellshock met his Crazy Town co-founder, Bret Mazur, in 1992. They first began making music under the name the Brimstone Sluggers, but by 1999, their moniker was changed to Crazy Town and the band had added members Rust Epique, James Bradley Jr. (aka JBJ), Doug Miller, Adam Goldstein (aka DJ AM) and Antonio Lorenzo “Trouble” Valli. Crazy Town’s debut album, “The Gift of Game,” released in November 1999 and the band supported the Red Hot Chili Peppers on tour shortly after.

Shellshock had been open about his struggles with addiction and appeared on several reality shows regarding the matter, including two seasons of VH1’s “Celebrity Rehab” and two seasons of its follow-up show “Sober House.” In 2012, he was admitted to the hospital after losing consciousness and fell into a coma before recovering. He was most recently arrested for a DUI in 2022.

Shellshock is survived by his three children, Halo, Gage and Phoenix.