John Foster Brings ‘Idol’ Audience to Tears with Heartfelt “I Cross My Heart” Dedication to Girlfriend

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Just six weeks after his American Idol audition aired, John Foster has his eyes on the prize. The 18-year-old’s journey has been nothing short of remarkable, and he’s proving with every performance that he has what it takes to go the distance.
Foster, who dreams of becoming a singing oncologist, first caught the judges’ attention with his cover of Alan Jackson’s “Don’t Rock the Jukebox.” While charming, the audition wasn’t quite enough to lock in a Golden Ticket. Carrie Underwood challenged him to sing something that better showcased his vocal range. Rising to the moment, John delivered a heartfelt rendition of Conway Twitty’s “Goodbye Time.” Even then, the judges were hesitant—but they ultimately gave him the ticket that launched his journey.

“I don’t know if vocally it’s there to make it through many, many rounds of American Idol, but I think you got a nice voice,” Luke Bryan told him. “It’s a yes. I went from a no to a yes.”

Weeks later, it’s clear that Luke’s initial doubts have been laid to rest. Foster has quietly but steadily emerged as one of the top contenders of the season. His consistent performances, warm stage presence, and easygoing charm have earned him a growing fanbase, especially among country music lovers.

On Monday night, John stepped into new territory with a performance of “I Cross My Heart.” He admitted that he’d never been able to sing a love song before that truly meant something to him—until now. The song was chosen by Carrie Underwood, who believed it would highlight the richness of his baritone and keep him rooted in the classic country style he loves. With his girlfriend watching from the audience, Foster delivered a touching and sincere performance that struck a chord with the judges.

“That was absolutely perfect,” Carrie said. “Hearing you sing that song, it felt comfortable, it felt genuine. I feel like this is one of your best performances, John, and it made me so happy.”

Luke Bryan followed up with a moment of honesty and praise. “I was doing my TikTok scroll daily, and I saw a clip of me saying I didn’t know if you could sing good enough back in your audition. And man, no one has ever proved me more wrong than you, and I’m so proud.”

From an uncertain audition to standing ovations, John Foster’s rise on American Idol is the story of quiet persistence, heartfelt performances, and proving that heart goes a long way.