Complex sentence: Alice in Chains rose to international fame as part of the grunge movement of the early 1990s, driven partly by Staley's distinct vocal style, as well as the harmonized vocals between him and Cantrell.
Split into simpler sentences: Alice in Chains rose to international fame as part of the grunge movement of the early 1990s. The band became known for Staley's distinct vocal style, as well as the harmonized vocals between him and Cantrell.