Question: The seventh season of American Idol, the annual reality show and singing competition, began on January 15, 2008, David Cook was announced the winner of the competition on May 21, 2008, defeating who, which American singer-songwriter, musician, and actor, as runner-up?
Sentence (from "David Archuleta"): In 2007, at sixteen years old, he became one of the youngest contestants on the seventh season of "American Idol".
Relevant evidence: No