Premise: Spencer Chamberlain (born January 4, 1983) is an American musician, best known for being the current lead vocalist for the metalcore band Underoath. Before fronting Underoath, Chamberlain was the vocalist for the band This Runs Through in which his brother, Phil Chamberlain, was the drummer (who is also the drummer for To Speak of Wolves). He is currently the vocalist of Sleepwave.
Hypothesis: He's been in a band with his sibling.