Since his audition, Foster has climbed his way to the top five in the show, performing songs like "Callin' Baton Rouge," "Jailhouse Rock" and Disney's "Almost There." On Monday night, he'll perform at 7 p.m. on ABC for a chance in the show's top 3. Those in the top 3 will head into the Sunday finale.

American Idol finalist John Foster's English teacher on former star student

It’s been a thrilling journey for Louisiana fans of American Idol, and now, they have even more reason to cheer. LSU biology student John Foster, just 18

Top 5, baby! He impressed the judges with a song from "Princess and the Frog," and with a country classic by Brooks and Dunn.

Louisiana's John Foster is headed into Sunday night's "American Idol" grand finale after another magical "Disney Night" on Monday's "Idol" episode.

John Foster has become a fan favorite since his debut on American Idol. In the most recent episode, where the singers had to work through a Mother's Day theme, John did his best, and the viewers started their voting. It turns out that the Addis native has made it to the Top 5.

Fan-fave singers John Foster and Jamal Roberts have both advanced to the Top 7 of American Idol, joining Slater Nalley, Thunderstorm Artis, Gabby Samone, Breanna Nix, and Mattie Pruitt. This is undoubtedly one of the strongest lineups in the show's 23-season history.

Multiple municipalities and law enforcement agencies came together to plan John Foster's hometown visit for American Idol.