"American Idol" went from 11 to nine contestants in the Rock & Roll Hall of Fame episode. Here's who stayed and who was sent home.

Now that American Idol has revealed the Top 20 from the Aulani, A Disney Resort & Spa in Ko Olina, Hawai’i, the competition opens up for the first time for America’s vote – and host Ryan Seacrest shared that gone is the American Idol app for voting.