John Foster, a Louisiana native and biology student at LSU with dreams of becoming a “singing oncologist”, stepped onto the American Idol stage not only to pursue music but also to honor a deeper purpose—helping those battling cancer.

At his first audition, he charmed the judges with a Conway Twitty classic and a heart full of purpose. Initially hesitant, Luke Bryan was won over by John’s Southern charm and authenticity, turning his “no” into a firm “yes.” Watch below.

But it was during the Top 20 round that John truly left his mark. Performing an original song titled “Tell That Angel I Love Her,” he brought the entire audience—and himself—to tears. The song, a raw, emotional tribute to his two late best friends Maggie Dunn and Caroline Gill, resonated deeply.As he closed the performance with the words, “I love you, Maggie,” Carrie Underwood asked about the heartfelt sign-off. John then pointed to the audience, where the parents of both girls sat, visibly moved.

Lyrics like:

📝 “Each tear that falls on my guitar / Is a hug from afar / Lord, won’t you tell that angel I love her?”
showcase not just his songwriting talent, but also his soul.