She wowed the judges at her audition in Savannah, Georgia and progressed through the competition, making it to the top 25. She became a part of the top 13 on March 1, 2012. Magrane was eliminated on March 15, 2012, finishing in 11th place. She is currently a junior at Howard W. Blake High School in Tampa, Florida.
During Shannon's time on the show, she performed several times before being eliminated on March 15, 2012. At her audition, Shannon sang "Something's Got to Hold on Me" by Etta James and was passed onto Hollywood by the judges. In Hollywood she sang "Fallin" by Alicia Keys, "Hit Em' Up Style (Oops!)" by Blu Cantrell, and What a Wonderful World" by Louis Armstrong. Shannon advanced on to the Las Vegas round she sang "At the Hop/"Blue Suede Shoes" by Danny & the Juniors/Carl Perkins with fellow contestant Joshua Ledet and Season 12 finalists Curtis Finch, Jr. and Amber Holcomb. At the final judgement stage in front of the judges, Shannon sang "The Trouble with Love Is" by Kelly Clarkson. In the Top 25, Shannon sang "Go Light Your World" by Kathy Troccoli and advanced to the Top 13. During the Top 13, she sang "I Have Nothing" by Whitney Houston and advanced to the Top 11, even when being set in the bottom 3 girls. During the Top 11, Shannon sang her final song "One Sweet Day" by Mariah Carey and Boyz II Men. She was eliminated and finished 11th out of all.
|Episode||Theme||Song choice||Original artist||Order #||Result|
|Audition||Auditioner's Choice||"Something's Got a Hold on Me"||Etta James||N/A||Advanced|
|Hollywood Round, Part 1||First Solo||"Fallin'"||Alicia Keys||N/A||Advanced|
|Hollywood Round, Part 2||Group Performance||"Hit 'Em Up Style (Oops!)"||Blu Cantrell||N/A||Advanced|
|Hollywood Round, Part 3||Second Solo||"What a Wonderful World"||Louis Armstrong||N/A||Advanced|
|Las Vegas Round||Songs from the 1950s Group Performance||"At the Hop" / "Blue Suede Shoes"||Danny & the Juniors / Carl Perkins||N/A||Advanced|
|Final Judgement||Final Solo||"The Trouble with Love Is"||Kelly Clarkson||N/A||Advanced|
|Top 25 (12 Women)||Personal Choice||"Go Light Your World"||Kathy Troccoli||10||Advanced|
|Top 13||Whitney Houston||"I Have Nothing"||Whitney Houston||6||Bottom 3 Women|
|Top 11||Year They Were Born||"One Sweet Day"||Mariah Carey & Boyz II Men||6||Eliminated|
Magrane appeared on The Today show and Anderson on March 20, 2012. On April 13, 2012 Magrane performed "The Star-Spangled Banner" at Busch Stadium prior to the season home opener of the St. Louis Cardinals. She also performed at the official welcome party of the 2012 Republican National Convention.
|Phillip Phillips · Jessica Sanchez · Joshua Ledet · Hollie Cavanagh · Skylar Laine · Elise Testone · Colton Dixon · DeAndre Brackensick · Heejun Han · Erika Van Pelt · Shannon Magrane · Jermaine Jones · Jeremy Rosado|