rock is perhaps best known as a producer for heavy metal bands such as metallica and mötley crüe. he has also worked with aerosmith, bon jovi, blue murder, the moffatts, cher, the cult, david lee roth, skid row, veruca salt, nina gordon, the offspring, 311, our lady peace, the tragically hip, the tea party, lostprophets, american hi-fi, simple plan, tonic, nelly furtado, jann arden, and ron sexsmith.