Carrie Underwood's iconic performance of 'Alone' after 20 years. Underwood memorably sang "Alone" on "American Idol" in 2005, delivering what fans consider to be one of the greatest performances ...

Carrie Underwood opened the latest episode of American Idol on Sunday, April 27, with a cover of Heart's "Alone," and fans say she "took the season by storm" with the nostalgic performance.

Carrie Underwood won "American Idol" 20 years ago but kept private life separate from her county music career. ... she sealed her victory with a bombastic version of Heart’s “Alone.” ...

'American Idol' judge Carrie Underwood had fans in shock when she performed Heart's "Alone" on the show for the first time since she sang it in 2005.

Carrie Underwood has come full circle since winning "American Idol" two decades ago. The singer has sold over 85 million albums, won eight Grammys and has become country music royalty.