*Alicia Keys has signed on to mentor the Top 7 “American Idol” contestants in belting “inspirational songs” — the theme for next week.

She will follow up her coaching duties on Tuesday’s broadcast with a performance on Wednesday’s two-hour “Idol Gives Back,” the show’s annual charity broadcast.

That bill will also include former Idol winner Carrie Underwood, Black Eyed Peas, Annie Lennox, Jeff Beck, Joss Stone, Mary J. Blige, and the All-Star Band.