The 36-year-old singer praised contestant Cassandra Coleman's performance, saying it made her leg hair grow.
The 'Idol' alum returned to the show's stage to deliver a memorable and emotional performance with one of the season's frontrunners.
The actor wants to hire Murphy to pen an original tune for his TV show.
Here's a look at which singers have made it through the intimidating Showstopper round.
17-year-old Hannah Everhart made it through to the top 24 on ‘American Idol’ on Sunday night.
This contestant gets the "Firework" pop star feeling the music on an all-new American Idol.
'American Idol' airs Sundays and Mondays at 8 p.m. ET/PT on ABC.
Fans had a lot of feelings on Sunday as the competition got cut down to the Top 24.
Kellyanne Conway’s 16-year-old daughter, Claudia Conway, was eliminated from ‘American Idol’ on Monday, following the duets round.
The 'American Idol' judge pondered a possible team-up with Swift and fans freaked out.
Producers reveal contestant Funke Lagoke's condition after she collapsed, face first on Monday's 'Idol.'
On Sunday, Kellyanne Conway’s 16-year-old daughter, Claudia Conway, stunned ‘American Idol’ judge, Katy Perry, with her new look.
The songstress seemed impressed by the 'Idol' contestant when she returned for the second round of the competition on Sunday.
ET spoke with 'American Idol' judge Katy Perry about motherhood and Hollywood Week, starting Sunday on ABC.
