In some instances , lead vocalists can be more than one in a group as seen in the group `` Alice in Chains '' , with singer Layne Staley ( and later William DuVall ) sharing vocal duties with guitarist Jerry Cantrell .
Also in some cases , there are two frontmen , such as Alice in Chains , with singer Layne Staley ( and later William DuVall ) sharing vocal duties with guitarist Jerry Cantrell , or Underoath , with singers Spencer Chamberlain and Aaron Gillespie ( drummer ) sharing vocal duties .
Lead vocalist