Idol Worship

'American Idol': Keith Urban Talks Trent Harmon's 'Amazing' Coronation Song

Keith Urban Academy of Country Music Awards 2016
Christopher Polk/ACM2016/Getty Images for dcp

Keith Urban performs onstage during the 51st Academy of Country Music Awards at MGM Grand Garden Arena on April 3, 2016 in Las Vegas.

When Trent Harmon performed his coronation song "Falling" on American Idol (April 6), there was a reason Keith Urban knew every word: he wrote it.

"I was singing along tonight with it, and Jen (Jennifer Lopez) says 'how do you know this song?'" he told a room full of reporters after the show.

"Falling" -- co-written with Dallas Davidson and Brett James -- is a bluesy jam that also allowed Harmon to show off his falsetto for the audience at the Dolby Theatre. The song is now available for purchase on iTunes.

'American Idol' Recap: Farewell Season Finalists Sing One Last Time for America's Vote 

"That one just sort of fell by the wayside a little bit," Urban said of the song. "I was focusing on the songs and the next thing I knew they called me and asked if I would be cool with Trent singing it. I was all for it."

And what did Urban think of Harmon's performance? "I heard his version of it and it was amazing," he said. 

As for Thursday night's finale, Urban said he will perform a "cover" with a mystery guest. "I am doing a song everybody knows with someone that I toured with years ago," he hinted. "We used to do this song together. It is going to be fun."

Urban said America has a tough choice to make between Harmon and La'Porsha Renae for who will be the last American Idol.

Harry Connick Jr. Hints at 'Special' Performance for 'American Idol' Finale, Offers Incentive for Series Winner

"Both had moments when their abilities were perfectly matched and really played to their strengths," he said. "La’Porsha is a phenomenal singer so there was never a question that she was going to be here. I thought it was all hers until Trent came out and sang and I thought this is a really close race."

Urban's new album, Ripcord, drops on May 6. His tour kicks off in Kansas City on June 2.