'American Idol' rocker Casey Bishop makes history with Chris Cornell tribute

American Idol revealed the results of the first public vote of Season 19 this Sunday, with the top 24 quickly slimming down to a top 16. Unsurprisingly, Casey Bishop, the dynamite rocker girl that judge Luke Bryan declared the winner after her first audition weeks ago, made it through. And it seemed like more than ever, Luke’s prophecy was coming true, when Casey pulled a page straight out of Season 7 Idol champ David Cook’s playbook.