Carrie Underwood on 'American Idol' finale

Tuesday's "American Idol" finale/extravaganza/circus will see Carrie Underwood's second return to the show this year. She previously appeared during Country Week and performed her new single "I Told You So" with mentor Randy Travis.

On Tuesday's finale between Kris Allen and Adam Lambert, Carrie will perform her remake of the 1985 Motley Crue hit "Home Sweet Home." A portion of the proceeds from the sales of the digital single will be donated to the Humane Society.