Related Information for Siobhan Magnus Siobhan Magnus was a contestant on Season 9 (2010) of American Idol.She is twenty years old and from Cape Cod, Massachusetts, US. She first auditioned for American Idol in Boston. As the former lead singer of the band Lunar Valve, Siobhan is no stranger to singing epically.Performances on American Idol:Top 6: Any Man of Mine (American Idol Studio Version)Top 7: When You Believe (American Idol Studio Version)Top 9 (Part 2): Suspicious Minds (American Idol Studio Version)Top 9 (Part 1): Acr.. read more