Steven Tyler, who was marking his first full season as an American Idol judge, U2, Judas Priest and Tom Jones were also among the many celebrity performers.
A record-breaking 122.4 million votes were cast following Tuesday night's performances by Lauren and Scotty, who represented the youngest final two in the show's ten-year history.
Check out pictures from the American Idol season ten finale below (with spoilers on who won):
More on the American Idol season finale:
> American Idol recap: The finale performances
> American Idol finale: Stars react
> American Idol finale: Former contestants react
> Lauren Alaina loses voice before 'Idol' final
> American Idol finale performance night: Pictures
> American Idol attracts record-breaking votes
> Poll result: Who should win American Idol?
> Read our American Idol news, recaps and features