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.

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

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.

In American Idol season 23's Disney Night part 2, John Foster sang The Bare Necessities from The Jungle Book and Rainbow Connection from The Muppet Movie. Jamal Roberts sang Ain't No Mountain High Enough from Remember the Titans and Beauty and the Beast from Beauty and the Beast.

American Idol took a moment to honor moms across America on Mother's Day (May 11). One special moment came when Louisiana native John Foster took the stage to sing a rendition Brooks & Dunn's 1991 hit "Believe." The song is not particularly easy to sing, as it features some spoken-word elements in the lyrics, as well as rafter-shaking notes.

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.