The 19-year-old Pickler auditioned for American Idol in the fall of 2005 in Greensboro, North Carolina. She sang both Kelly Clarkson's "Since U Been Gone" and Martina McBride's "A Broken Wing". The judges sent her to Hollywood. Pickler advanced through the semi-final rounds in February. On March 9, she reached the Top 12.
Pickler was among judge Simon Cowell's favorites. He once predicted Pickler would be in the final three, and said he preferred her over the previous season's winner, Carrie Underwood. Recognized for her "quirky" personality and Southern charm, Pickler gained attention on the show by saying that she had hardly ever performed before real audiences, and by mispronouncing words. She was compared to Jessica Simpson in a March 27 story in US Weekly magazine titled "Kellie: The Next Jessica Simpson", due to her "sweet Southern style and ditzy demeanor". Pickler has stated several times that she was not heavily exposed to modern pop culture.
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