The pop diva was blown away by 'Idol' hopeful Alyssa Raghu's rendition of 'The One That Got Away.'
Katy Perry experienced a wide range of emotions as the top 14 contestants took the stage on 'American Idol.'
The 'Chained to the Rhythm' singer is letting it all out!
Bobby Bones assumed hosting duties in Seacrest's absence, as the remaining contestants vied for a spot in the top 14.
The hard-working host made 'Idol' history by taking the day off, and Katy Perry joked it's proof that he's 'human after all.'
ET was on set with the stars before they took the stage with the 'American Idol' contestants.
It's been an emotional season for the judge.
Katy Perry experienced a lot of different emotions as the top 20 contestants performed on 'American Idol.'
On Sunday's 'American Idol,' Katy Perry told singer Jeremiah Lloyd Harmon she's proud of him for sharing his story.
The singer expressed her love and support 'from one pastor's kid to another.'
Katy Perry, Lionel Richie and Luke Bryan hula on the beach with the top 40 finalists in ET's first look!
Katy Perry couldn't help but let it all out after the sweet surprise engagement during Hollywood Week.
The recently engaged 'Idol' judge couldn't contain her tears of joy during a beautiful on-stage proposal on Monday's episode.
Hollywood Week on 'American Idol' included moments that were heavy, heartwarming and hilarious.
