Question: What is the name of the American singer songwriter and television personality whose identity was used in an off-Broadway musical based on 'American Idol' where contestants dream of winning a spot as the opening act for this celebrities new tour?
Sentence (from "Clay Aiken"): Clay Aiken (born Clayton Holmes Grissom; November 30, 1978) is an American singer, songwriter, television personality, actor, author, politician, and activist.
Relevant evidence: Yes