The decade has been a comfort zone for contenders since season 1; see how Adam Lambert, Carrie Underwood, Chris Daughtry, Fantasia, and others each raised the bar for season 11's top 8
''Alone'' by Heart (1987), sung during Top 11 Billboard Number Ones night
Nobody figured the corn-fed country girl could rock out, but when Carrie stepped out onto the Idol stage in her teased-up hair and black leather jacket, she proved she could power belt with the best of them. It was absolutely spine tingling to hear her hit those high notes in the chorus. Ann Wilson should be proud.
Image Credit: Fox