'American Idol' recap: Katy Perry meets her country doppelgänger, Luke Bryan predicts a winner - USA TODAY

During Sunday's "American Idol," one singer made an impression not only with her voice, but also with her striking resemblance to judge Katy Perry.

During Sunday night's episode, one auditioner made an impression not only with her voice but also with her striking resemblance to "Idol" judge Katy Perry.

When she entered the audition room, the resemblance was not lost on Perry.

During Sunday night's episode of "American Idol," Hannah Everhart made an impression not only with her voice, but also with her striking resemblance to judge Katy Perry. (Photo: Christopher Willard, ABC).

Everhart wasn't the only standout performer. Casey Bishop, a 15-year-old from Estero, Florida, also wowed the judges, even though she confessed most of her singing experience has come from belting into a hairbrush.

Casey Bishop, a 15-year-old from Estero, Florida, also wowed the judges, even though she confessed most of her singing experience has come from belting into a hairbrush. (Photo: Christopher Willard, ABC).

Claudia Conway digs into her past for 'American Idol' audition

"Kacey, I didn't think anybody would get close to Alejandro's audition, as far as me being just, like, dipped in Disney and sparkles and flowers and doves, and that's what your audition was for me," he said

"I think she's the damn winner of 'American Idol.' Period."

'American Idol' auditions: See the contestant Katy Perry just declared 'the winner'