Siobhan Magnus was born on March 15, 1990, to parents Alan and Colleen Magnus. She was raised in Barnstable, Massachusetts, along with her two older brothers, her older sister and her two younger sisters.Magnus’ father is a singer-songwriter, her siblings play in various bands, and her brother Rory is in the film animation industry.She is the niece of two musicians: Tracy Ferrie, currently the bassist for Boston and former bassist for Stryper, and Alan Ware, drummer for Ultrasonic Rock Orchestra.
Magnus is a 2008 graduate of Barnstable High School in Hyannis, Massachusetts. In school, she was a member of the Barnstable High School Drama Club.When the drama club was filmed for an internet reality show by Warner Brothers,she was featured as one of three Dorothys for the play The Wizard of Oz. In May 2008, in a local profile about Magnus’s singing talent, the music department chair of her school district was quoted as saying “Hands down, I think she’d win ‘American Idol’.” During her senior year in high school, she was voted the most individual girl.She auditioned as a vocal major Berklee College of Music, but was not accepted.She attended Salem State College, but dropped out after one semester because she felt out of place as a non-partier.Magnus worked as an apprentice glassblower in Hyannis before taking part in American Idol.
Magnus auditioned for American Idol in the summer of 2009 in Boston, and was one of two Massachusetts contestants to make the semi-finals of the show.Magnus emerged as an early contender after her interpretation of “Think” by Aretha Franklin and “Paint It, Black” by The Rolling Stones. Magnus’ vocal range and dramatic performances prompted judge Kara DioGuardi to compare her to Season 8 runner-up Adam Lambert. Magnus’ elimination during top 6 week came as a surprise to many Idol experts.It was reported that as a result, many fans of Magnus had vowed not to watch the rest of the American Idol season.
The week after Magnus’ dismissal, American Idol had its lowest ratings since 2002. Magnus, along with twelfth season finalist Angie Miller, are the only finalists on American Idol from Massachusetts.