After, Foster took the stage to perform six songs for a large crowd of eager listeners — many of which he covered on the show. First, he sang "Don’t Rock the Jukebox" by Alan Jackson, followed quickly by Elvis classic “Jailhouse Rock."

Louisiana's John Foster sings 'The Rainbow Connection' on Monday's 'American Idol' before learning he was heading to the 'Idol' finals. Louisiana's John Foster is headed into Sunday night's "American Idol" grand finale after another magical "Disney Night" on Monday's "Idol" episode.